tr2/boat: fix Lara's room number when on boat

This tests Lara's position more accurately for cases when the boat's
room number is the water room below, but we want Lara to be defined in
the dry room above to remove her underwater hue.

Resolves #1596.

docs/tr2/CHANGELOG.md

@@ -11,6 +11,7 @@
 - fixed the camera being cut off after using the gong hammer in Ice Palace (#1580)
 - fixed the audio not being in sync when Lara strikes the gong in Ice Palace (#1725)
 - fixed door cheat not working with drawbridges (#1748)
+- fixed Lara's underwater hue being retained when re-entering a boat (#1596)
 
 ## [0.5](https://github.com/LostArtefacts/TRX/compare/afaf12a...tr2-0.5) - 2024-10-08
 - added `/sfx` command

docs/tr2/README.md

@@ -33,6 +33,7 @@ decompilation process. We recognize that there is much work to be done.
 
 - fixed TGA screenshots crashing the game
 - fixed the camera being cut off after using the gong hammer in Ice Palace
+- fixed Lara's underwater hue being retained when re-entering a boat
 
 #### Audio
 

src/tr2/game/objects/vehicles/boat.c

@@ -635,7 +635,7 @@ void __cdecl Boat_Control(const int16_t item_num)
     const int32_t hfr = Boat_TestWaterHeight(boat, BOAT_FRONT, BOAT_SIDE, &fr);
 
     int16_t room_num = boat->room_num;
-    const SECTOR *const sector =
+    const SECTOR *sector =
         Room_GetSector(boat->pos.x, boat->pos.y, boat->pos.z, &room_num);
     int32_t height =
         Room_GetHeight(sector, boat->pos.x, boat->pos.y, boat->pos.z);
@@ -711,7 +711,6 @@ void __cdecl Boat_Control(const int16_t item_num)
 
         if (room_num != boat->room_num) {
             Item_NewRoom(item_num, room_num);
-            Item_NewRoom(g_Lara.item_num, room_num);
         }
 
         boat->rot.z += boat_data->tilt_angle;
@@ -722,6 +721,12 @@ void __cdecl Boat_Control(const int16_t item_num)
         lara->rot.y = boat->rot.y;
         lara->rot.z = boat->rot.z;
 
+        sector = Room_GetSector(
+            lara->pos.x, lara->pos.y - 5, lara->pos.z, &room_num);
+        if (room_num != g_LaraItem->room_num) {
+            Item_NewRoom(g_Lara.item_num, room_num);
+        }
+
         Item_Animate(lara);
 
         if (lara->hit_points > 0) {