From fa1f8263091c105633afa63be211f7e430e8eb61 Mon Sep 17 00:00:00 2001
From: Kelly Kinkade <kelly.lynn.martin@gmail.com>
Date: Fri, 8 Sep 2023 10:49:06 -0500
Subject: [PATCH 1/3] bunch of item vmethod updates

---
 df.items.xml | 180 +++++++++++++++++++++++++++++----------------------
 1 file changed, 101 insertions(+), 79 deletions(-)

diff --git a/df.items.xml b/df.items.xml
index d7b37f46a..3c673c30d 100644
--- a/df.items.xml
+++ b/df.items.xml
@@ -203,6 +203,9 @@
 
             <vmethod ret-type='bool' name='isFoodStorage'/>
             <vmethod ret-type='bool' name='isTrackCart'/>
+
+            -- 20
+
             <vmethod ret-type='bool' name='isWheelbarrow'/>
             <vmethod ret-type='int32_t' name='getVehicleID'/>
             <vmethod ret-type='bool' name='isAmmo'/>
@@ -210,83 +213,87 @@
                 <ret-type><pointer type-name='item_stockpile_ref'/></ret-type>
             </vmethod>
             <vmethod ret-type='bool' name='containsPlaster'/>
+
             <vmethod ret-type='bool' name='isPlaster'/>
             <vmethod ret-type='bool' name='getColorOverride'> <pointer/> </vmethod>
 
-            -- 26
-
             <vmethod name='getHistoryInfo'>
                 <ret-type><pointer><pointer type-name='item_history_info'/></pointer></ret-type>
             </vmethod>
             <vmethod ret-type='bool' name='hasToolUse'> <enum base-type='int16_t' type-name='tool_uses' name='use'/> </vmethod>
             <vmethod ret-type='bool' name='hasInvertedTile'/>
+
+            -- 30
+
             <vmethod name='becomePaste'/>
             <vmethod name='becomePressed'/>
             <vmethod name='calculateWeight'/>
-
             <vmethod ret-type='bool' name='isSharpStone'/>
             <vmethod ret-type='bool' name='isCrystalGlassable'/>
+
             <vmethod ret-type='bool' name='isMetalOre'> <int16_t name='matIndex'/> </vmethod>
             <vmethod name='clearLastTempUpdateTS'/>
             <vmethod name='listNotableKills'> <pointer type-name='stl-string' name='string_ptr'/> </vmethod>
-
-            -- 37
-
             <vmethod ret-type='uint16_t' name='getSpecHeat'/>
             <vmethod ret-type='uint16_t' name='getIgnitePoint'/>
+
+            -- 40
+
             <vmethod ret-type='uint16_t' name='getHeatdamPoint'/>
             <vmethod ret-type='uint16_t' name='getColddamPoint'/>
             <vmethod ret-type='uint16_t' name='getBoilingPoint'/>
-
             <vmethod ret-type='uint16_t' name='getMeltingPoint'/>
             <vmethod ret-type='uint16_t' name='getFixedTemp'/>
+
             <vmethod ret-type='int32_t' name='getSolidDensity'/>
             <vmethod ret-type='bool' name='materialRots'/>
             <vmethod ret-type='uint16_t' name='getTemperature'/>
-
-            -- 47
-
             <vmethod ret-type='bool' name='adjustTemperature'>
                 <uint16_t name='target'/>
                 <int32_t name='unk'/>
             </vmethod>
-            <vmethod/>
+            <vmethod comment='initialization for body components?'/>
+
+            -- 50
+
             <vmethod name='extinguish'/>
             <vmethod ret-type='int8_t' name='getGloveHandedness'/>
             <vmethod name='setGloveHandedness'> <int8_t/> </vmethod>
-
             <vmethod ret-type='bool' name='isSpike'/>
             <vmethod ret-type='bool' name='isScrew'/>
+
             <vmethod ret-type='bool' name='isBuildMat'/>
             <vmethod ret-type='bool' name='isTemperatureSafe'> <int8_t comment='1 fire, 2 magma'/> </vmethod>
             <vmethod name='setRandSubtype'> <int32_t name='entity_id'/> </vmethod>
-
-            -- 57
-
             <vmethod ret-type='int8_t' name='getWeaponSize' comment='weapon racks have capacity 5'/>
             <vmethod ret-type='int16_t' name='getWear'/>
+
+            - 60
+
             <vmethod name='setWear'> <int16_t/> </vmethod>
             <vmethod ret-type='int32_t' name='getMaker'/>
             <vmethod name='setMaker'> <int32_t name='unit_id'/> </vmethod>
-
             <vmethod name='getCorpseInfo'>
                 <pointer type-name='int16_t' name='prace'/>
                 <pointer type-name='int16_t' name='pcaste'/>
                 <pointer name='phfig'> <pointer type-name='historical_figure'/> </pointer>
                 <pointer name='punit'> <pointer type-name='unit'/> </pointer>
             </vmethod>
-            <vmethod/>
-            <vmethod name='getGloveFlags'>
-                <ret-type><pointer><df-flagarray/></pointer></ret-type>
-            </vmethod>
+            <vmethod name='getBodyInfo'> <ret-type><pointer type-name='caste_body_info'/></ret-type> </vmethod>
+
+            <vmethod name='getGloveFlags'> <ret-type><pointer><df-flagarray/></pointer></ret-type> </vmethod>
             <vmethod name='getItemShapeDesc' comment='a statue/figurine of "string goes here"'>
                 <ret-type><pointer type-name='stl-string'/></ret-type>
             </vmethod>
-            <vmethod/>?
-            <vmethod/>?
+            <vmethod comment='returns null except for statues; for statues returns pointer to unk_110'>
+                <ret-type><pointer type-name='int32_t'/></ret-type>
+            </vmethod>
+            <vmethod comment='returns null except for statues; for statues returns pointer to unk_114'>
+                <ret-type><pointer type-name='int32_t'/></ret-type>
+            </vmethod>
             <vmethod ret-type='bool' name='isMatchingAmmoItem'> <pointer type-name='item_filter_spec'/> </vmethod>
 
-            -- 67
+            -- 70
 
             <vmethod name='getImageRef'>
                 <pointer name='id'><pointer type-name='int32_t'/></pointer>
@@ -309,7 +316,7 @@
             <vmethod name='incrementCritterAirdrownTimer'/>
             <vmethod ret-type='int32_t' name='getRotTimer'/>
 
-            -- 77
+            -- 80
 
             <vmethod name='setRotTimer'> <int32_t name='val'/> </vmethod>
             <vmethod name='incrementRotTimer'/>
@@ -342,10 +349,10 @@
                 <bool/>
                 <int32_t/>
             </vmethod>
-            <vmethod ret-type='bool' name='isWeapon'/>
 
-            -- 88
+            -- 90
 
+            <vmethod ret-type='bool' name='isWeapon'/>
             <vmethod ret-type='bool' name='isArmorNotClothing'/>
             <vmethod ret-type='bool' name='isMillable'/>
             <vmethod ret-type='bool' name='isProcessableThread'/>
@@ -363,7 +370,7 @@
                 <int32_t name='hunger'/>
             </vmethod>
 
-            -- 97
+            -- 100
 
             <vmethod ret-type='bool' name='moveToGround'>
                 <int16_t name='x'/> <int16_t name='y'/> <int16_t name='z'/>
@@ -389,14 +396,15 @@
                 <pointer/>
             </vmethod>
             <vmethod name='notifyLostMasterwork'/>
-            <vmethod name='addMagic'><int32_t/><int32_t/><int32_t/></vmethod>
-            <vmethod name='magic_unk1'><int32_t/><int32_t/></vmethod>
-            <vmethod name='magic_unk2'><int32_t/><int32_t/></vmethod>
 
             -- 110
 
+            <vmethod name='addMagic'><int32_t/><int32_t/><int32_t/></vmethod>
+            <vmethod name='magic_unk1'><int32_t/><int32_t/></vmethod>
+            <vmethod name='magic_unk2'><int32_t/><int32_t/></vmethod>
             <vmethod name='magic_unk3'><int32_t/></vmethod>
             <vmethod name='magic_unk4'><int32_t/><int32_t/><int32_t/></vmethod>
+
             <vmethod name='setDisplayColor'><pointer/></vmethod>
             <vmethod ret-type='bool' name='isDamagedByHeat'/>
             <vmethod ret-type='bool' name='needTwoHandedWield'> <int32_t/> </vmethod>
@@ -407,14 +415,15 @@
                 <bool name='preserve_containment'/>
             </vmethod>
             <vmethod ret-type='bool' name='isTameableVermin'/>
-            <vmethod ret-type='bool' name='isDye'/>
-            <vmethod ret-type='bool' name='isMilkable'><int32_t/><int32_t/></vmethod>
 
-            -- 119
+            -- 120
 
+            <vmethod ret-type='bool' name='isDye'/>
+            <vmethod ret-type='bool' name='isMilkable'><int32_t/><int32_t/></vmethod>
             <vmethod ret-type='bool' name='isSandBearing'/>
             <vmethod ret-type='bool' name='isLyeBearing'/>
             <vmethod ret-type='bool' name='isAnimalProduct'/>
+
             <vmethod name='getStorageInfo'>
                 <pointer type-name='int16_t' name='item_type'/>
                 <pointer type-name='int16_t' name='material_category'/>
@@ -422,7 +431,6 @@
             <vmethod ret-type='bool' name='addWear'>
                 <int32_t name='delta'/> <bool name='simple'/> <bool name='lose_masterwork'/>
             </vmethod>
-
             <vmethod ret-type='bool' name='incWearTimer'> <int32_t name='delta'/> </vmethod>
             <vmethod ret-type='bool' name='checkWearDestroy'>
                 <bool name='simple'/> <bool name='lose_masterwork'/>
@@ -433,6 +441,9 @@
                 <uint16_t name='temp'/> <int32_t name='size'/>
                 <int16_t name='body_part_id'/> <uint16_t name='flags'/>
             </vmethod>
+
+            -- 130
+
             <vmethod name='removeContaminantByIdx'>
                 <int32_t name='index'/> <int32_t name='amount'/>
             </vmethod>
@@ -440,9 +451,6 @@
                 <int16_t name='mat_type'/> <int32_t name='mat_index'/>
                 <int32_t name='amount'/>
             </vmethod>
-
-            -- 129
-
             <vmethod name='tradeUnitContaminants'>
                 <pointer type-name='unit'/> <int16_t name='body_part_id'/>
             </vmethod>
@@ -452,12 +460,12 @@
             <vmethod name='tradeItemContaminants2'>
                 <pointer type-name='item_actual'/>
             </vmethod>
+
             <vmethod name='contaminateWound'>
                 <pointer type-name='unit'/> <pointer type-name='unit_wound'/>
                 <uint8_t name='shift'/> <int16_t name='body_part_id'/>
             </vmethod>
             <vmethod name='write_file'> <pointer name='file' type-name='file_compressorst'/> </vmethod>
-
             <vmethod name='read_file'>
                 <pointer name='file' type-name='file_compressorst'/>
                 <enum name='loadversion' type-name='save_version'/>
@@ -466,25 +474,25 @@
                 <ret-type><pointer><stl-vector type-name='pointer'/></pointer></ret-type>
             </vmethod>
             <vmethod ret-type='bool' name='isNotHeld'/>
-            <vmethod ret-type='bool' name='isSplittable' comment='if false, you throw the entire stack at once'/>
-            <vmethod name='addDefaultThreadImprovement'><pointer type-name='historical_entity' comment='add default thread improvement to items made of cloth'/></vmethod>
 
-            -- 139
+            -- 140
 
+            <vmethod ret-type='bool' name='isSplittable' comment='if false, you throw the entire stack at once'/>
+            <vmethod name='addDefaultThreadImprovement'><pointer type-name='historical_entity' comment='add default thread improvement to items made of cloth'/></vmethod>
             <vmethod name='addThreadImprovement'><pointer type-name='item'/><pointer type-name='historical_entity' comment='add a specific thread improvement to items made of cloth'/></vmethod>
             <vmethod name='propagateUnitRefs'/> add to unit.owned_items/traded_items
             <vmethod ret-type='bool' name='isSand'/>
-            <vmethod ret-type='int32_t' comment='returns item_actual.unk_1'/>
 
+            <vmethod ret-type='int32_t' comment='returns item_actual.unk_1'/>
             <vmethod ret-type='int32_t' name='getStackSize'/>
             <vmethod name='addStackSize'> <int32_t name='amount'/> </vmethod>
             <vmethod name='setStackSize'> <int32_t name='amount'/> </vmethod>
             <vmethod ret-type='bool' name='isAmmoClass'> <pointer type-name='stl-string'/> </vmethod>
-            <vmethod ret-type='bool' name='isAutoClean'
-                     comment='delete on_ground every season when in ANY_AUTO_CLEAN; default true'/>
 
-            -- 149
+            -- 150
 
+            <vmethod ret-type='bool' name='isAutoClean'
+                     comment='delete on_ground every season when in ANY_AUTO_CLEAN; default true'/>
             <vmethod ret-type='bool' name='setTemperatureFromMapTile'>
                 <int32_t name='x'/> <int32_t name='y'/> <int32_t name='z'/>
                 <bool name='local'/> <bool name='contained'/>
@@ -499,26 +507,26 @@
                 <bool name='local'/> <bool name='contained'/> <bool name='adjust'/>
                 <int32_t name='multiplier'/>
             </vmethod>
+
             <vmethod ret-type='bool' name='updateTemperature'>
                 <uint16_t name='temp'/> <bool name='local'/>
                 <bool name='contained'/> <bool name='adjust'/>
                 <int32_t name='multiplier'/>
             </vmethod>
-
             <vmethod ret-type='bool' name='updateFromWeather'/>
             <vmethod ret-type='bool' name='updateContaminants'/>
             <vmethod ret-type='bool' name='checkTemperatureDamage'/>
             <vmethod ret-type='bool' name='checkHeatColdDamage'/>
-            <vmethod ret-type='bool' name='checkMeltBoil'/>
 
-            -- 159
+            -- 160
 
+            <vmethod ret-type='bool' name='checkMeltBoil'/>
             <vmethod ret-type='int16_t' name='getMeleeSkill'/>
             <vmethod ret-type='int16_t' name='getRangedSkill'/>
             <vmethod name='setQuality'> <int16_t name='quality'/> </vmethod>
             <vmethod ret-type='int16_t' name='getQuality'/>
-            <vmethod ret-type='int16_t' name='getOverallQuality'/>
 
+            <vmethod ret-type='int16_t' name='getOverallQuality'/>
             <vmethod ret-type='int16_t' name='getImprovementQuality'/>
             <vmethod ret-type='int32_t' name='getProjectileSize'/>
             <vmethod ret-type='bool' name='isImprovable'>
@@ -529,17 +537,17 @@
                 <int16_t name='item_quality'/>
                 <int32_t name='unk1' comment='when 0, set item_rockst sharpness to 0'/> might be int8_t or bool
             </vmethod>
-            <vmethod ret-type='int32_t' name='getSharpness'/>
 
-            -- 169
+            -- 170
 
+            <vmethod ret-type='int32_t' name='getSharpness'/>
             <vmethod ret-type='bool' name='isTotemable'/>
             <vmethod ret-type='bool' name='isDyeable'/>
             <vmethod ret-type='bool' name='isNotDyed'/>
             <vmethod ret-type='bool' name='isDyed'/>
-            <vmethod ret-type='bool' name='canSewImage'/>
 
-            <vmethod ret-type='bool'/>
+            <vmethod ret-type='bool' name='canSewImage'/>
+            <vmethod ret-type='bool' name='canHaveImageSewnOnto'/>
             <vmethod ret-type='bool' name='isProcessableVialAtStill'/>
             <vmethod ret-type='bool' name='isSimilarToItem'>
                 <enum base-type='int16_t' name='item_type' type-name='item_type'/>
@@ -548,17 +556,17 @@
                 <int32_t name='mat_index'/>
             </vmethod>
             <vmethod ret-type='int32_t' name='getBlockChance'/>
-            <vmethod ret-type='int32_t' comment='returns 10 for tools and weapons, 0 for most other item types'/>
 
-            -- 179
+            -- 180
 
+            <vmethod ret-type='int32_t' name='getParryChance'/>
             <vmethod ret-type='int16_t' name='getMakerRace'/>
             <vmethod name='setMakerRace'> <int16_t/> </vmethod>
             <vmethod ret-type='int8_t' name='getEffectiveArmorLevel'
                     comment="adds 1 if it has [METAL_ARMOR_LEVELS] and it's made of an inorganic mat"/>
-            <vmethod ret-type='bool'/>
-            <vmethod ret-type='bool' name='isItemOrganicCloth'/> only for item_cloth
+            <vmethod ret-type='bool' name='isConstructed'/>
 
+            <vmethod ret-type='bool' name='isItemOrganicCloth'/> only for item_cloth
             <vmethod ret-type='bool' name='isMadeOfOrganicCloth'/> for all constructed items
             <vmethod name='coverWithContaminant' comment='also stops fire; used for rain'>
                 <int16_t name='mat_type'/> <int32_t name='mat_index'/>
@@ -569,13 +577,13 @@
                 <enum type-name='improvement_type' name='imp_type'/>
             </vmethod>
             <vmethod ret-type='bool' name='hasImprovements'/> any at all
+
+            -- 190
+
             <vmethod ret-type='bool' name='isImproved'/>
             <vmethod name='getMagic'>
                 <ret-type><pointer><stl-vector pointer-type='item_magicness'/></pointer></ret-type>
             </vmethod>
-
-            -- 189
-
             <vmethod name='getItemDescription'>
                 <pointer type-name='stl-string'/>
                 <int8_t name='plurality' comment="0 = prickle berries [2], 1 = prickle berry, 2 = prickle berries"/>
@@ -587,32 +595,32 @@
             <vmethod name='getItemBasicName' comment='usually just "item"'>
                 <pointer type-name='stl-string'/>
             </vmethod>
+
             <vmethod ret-type='int32_t' name='getImprovementsValue'> <pointer type-name='caravan_state' name='caravan'/> </vmethod>
             <vmethod ret-type='bool' name='isExtractBearingFish'/>
-
             <vmethod ret-type='bool' name='isExtractBearingVermin'/>
-            <vmethod ret-type='int32_t' comment='for armor, clothing, weapons, and tools, returns material size from the corresponding itemdef'/>
+            <vmethod ret-type='int32_t' name='getMaterialSizeForMelting' comment='for armor, clothing, weapons, and tools, returns material size from the corresponding itemdef'/>
             <vmethod ret-type='int32_t' name='getBaseWeight'/>
-            <vmethod ret-type='int32_t' name='getWeightShiftBits'/>
-            <vmethod ret-type='bool' name='isCollected'/>
 
-            -- 199
+            -- 200
 
+            <vmethod ret-type='int32_t' name='getWeightShiftBits'/>
+            <vmethod ret-type='bool' name='isCollected'/>
             <vmethod ret-type='bool' name='isEdibleVermin'/>
             <vmethod ret-type='uint8_t' name='drawSelf'/>
             <vmethod ret-type='bool' name='isRangedWeapon'/>
-            <vmethod ret-type='bool' name='isClothing'/>
 
+            <vmethod ret-type='bool' name='isClothing'/>
             <vmethod ret-type='bool' name='isWet'/>
             <vmethod ret-type='int32_t' name='getCurrencyValue' comment='that is, value of coins'>
                 <pointer type-name='historical_entity' name='appraiser'/>
             </vmethod>
             <vmethod ret-type='bool' name='isAssignedToStockpile'/>
             <vmethod ret-type='bool' name='isAssignedToThisStockpile'> <int32_t/> </vmethod>
-            <vmethod name='detachStockpileAssignment' comment='also removes links from the pile'/>
 
-            -- 208
+            -- 210
 
+            <vmethod name='detachStockpileAssignment' comment='also removes links from the pile'/>
             <vmethod name='removeStockpileAssignment' comment='just wipes the fields'/>
             <vmethod name='getStockpile2'>
                 <ret-type><pointer type-name='item_stockpile_ref'/></ret-type>
@@ -623,16 +631,32 @@
                 <pointer name='u' type-name='unit'/>
                 <pointer name='j' type-name='job'/>
             </vmethod>
-            <vmethod><int32_t/><int32_t/><int32_t/><int32_t/><int32_t/><int32_t/><int32_t/><int32_t/><int32_t/><int32_t/><int32_t/><int32_t/></vmethod>
-            <vmethod><int32_t/></vmethod>
+            <vmethod name='addImprovements'>
+                <int32_t/>
+                <int32_t/>
+                <int32_t/>
+                <int32_t/>
+                <int16_t name='material'/>
+                <int32_t name='matgloss'/>
+                <int16_t/>
+                <int32_t/>
+                <int32_t/>
+                <int8_t/>
+                <int16_t/>
+                <int32_t/>
+            </vmethod>
 
+            <vmethod name='copyImprovementsFrom'><pointer type-name='item'/></vmethod>
             <vmethod ret-type='int32_t' name='getThreadDyeValue'> <pointer type-name='caravan_state' name='caravan'/> </vmethod>
             <vmethod name='getColorAndShape'>
                 <pointer name='colors'><stl-vector type-name='int16_t'/></pointer>
                 <pointer name='shapes'><stl-vector type-name='int16_t'/></pointer>
             </vmethod>
-            <vmethod ret-type='bool'/>
+            <vmethod name='isCritter' ret-type='bool'/>
             <vmethod ret-type='bool' name='isArmor' comment='for armor user skill encumberance'/>
+
+            -- 220
+
             <vmethod ret-type='int32_t' name='calcUniformScore'>
                 <pointer type-name='squad_uniform_spec'/>
                 <bool name='exact_match'/>
@@ -640,29 +664,27 @@
                 <enum base-type='int16_t' type-name='job_skill' name='best_melee'/>
                 <enum base-type='int16_t' type-name='job_skill' name='best_ranged'/>
             </vmethod>
-
-            -- 218
-
             <vmethod ret-type='int32_t' name='calcBaseUniformScore'/>
-            <vmethod><int32_t/><int32_t/><int32_t/></vmethod>
+            <vmethod ret-type='int32_t'> <int32_t name='race_id'/><int32_t name='caste_id'/><int32_t name='maximum'/></vmethod>
             <vmethod ret-type='bool'/>
             <vmethod ret-type='bool'/>
-            <vmethod><int32_t/><int32_t/></vmethod> related to history_info
 
+            <vmethod><int32_t/><int32_t/></vmethod> related to history_info
             <vmethod><int32_t/><int32_t/><int32_t/><int32_t/><int32_t/><int32_t/><int32_t/><int32_t/></vmethod> also history_info
             <vmethod/> history_info
             <vmethod/> history_info
             <vmethod name='getSlabEngravingType'>
                 <ret-type><enum base-type='int16_t' type-name='slab_engraving_type'/></ret-type>
             </vmethod>
-            <vmethod ret-type='int32_t' name='getAbsorption'/>
 
-            -- 228
+            -- 230
 
+            <vmethod ret-type='int32_t' name='getAbsorption'/>
             <vmethod ret-type='bool'/>
             <vmethod ret-type='bool' name='isGemMaterial'/>
             <vmethod name='setGemShape'> <int32_t name='shape' ref-target='descriptor_shape'/> </vmethod>
             <vmethod ret-type='bool' name='hasGemShape'/>
+
             <vmethod name='getGemShape'>
                 <ret-type><int32_t ref-target='descriptor_shape'/></ret-type>
             </vmethod>
@@ -846,7 +868,7 @@
         <int16_t name='normal_caste' ref-target='caste_raw' aux-value='$$.normal_race' comment='unit.enemy.normal_caste'/>
 
         <int32_t name='rot_timer'/>
-        <int8_t name='unk_8c'/>
+        <int8_t name='unk_8c' comment='if zero, item is a generic instance of its race and caste; do not process unit id'/>
 
         <compound name='body'>
             <stl-vector name='wounds' pointer-type='unit_wound'/>

From 1fbd87f6d02b29c86f0720333e7a66131965abb8 Mon Sep 17 00:00:00 2001
From: Kelly Kinkade <kelly.lynn.martin@gmail.com>
Date: Fri, 8 Sep 2023 10:51:03 -0500
Subject: [PATCH 2/3] add changelog

---
 changelog.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/changelog.txt b/changelog.txt
index d808b2cbf..5d97c0d4c 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -21,6 +21,7 @@ Template for new versions:
 # Future
 
 ## Structures
+- Identified a number of previously anonymous virtual methods in ``itemst``
 
 # 50.09-r3
 

From 18cf15d60c18fb736156d462b640c0c1487daaf4 Mon Sep 17 00:00:00 2001
From: Kelly Kinkade <kelly.lynn.martin@gmail.com>
Date: Sat, 9 Sep 2023 19:49:55 -0500
Subject: [PATCH 3/3] remove 's' from `addImprovement`

---
 df.items.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/df.items.xml b/df.items.xml
index 3c673c30d..ab0d5e971 100644
--- a/df.items.xml
+++ b/df.items.xml
@@ -631,7 +631,7 @@
                 <pointer name='u' type-name='unit'/>
                 <pointer name='j' type-name='job'/>
             </vmethod>
-            <vmethod name='addImprovements'>
+            <vmethod name='addImprovement'>
                 <int32_t/>
                 <int32_t/>
                 <int32_t/>