tr1/data: inject Khamoon trapdoor triggers

This injects dummy triggers in rooms 10 and 18 for trapdoors 33 and 34
in City of Khamoon.

Part of #1744.

docs/tr1/CHANGELOG.md

@@ -2,6 +2,7 @@
 - added support for wading, similar to TR2+ (#1537)
 - fixed missing pushblock SFX in Natla's Mines (#1714)
 - fixed crash reports not working in certain circumstances (#1738)
+- fixed missing trapdoor triggers in City of Khamoon (#1744)
 - improved enemy item drops by supporting the TR2+ approach of having drops defined in level data (#1713)
 - improved Italian localization for the Config Tool
 

docs/tr1/README.md

@@ -444,7 +444,7 @@ Not all options are turned on by default. Refer to `TR1X_ConfigTool.exe` for det
     - **St. Francis' Folly**: moved the music trigger for track 3 in room 4 behind the Neptune door, and restored track 15 to play after using the 4 keys
     - **The Cistern**: missing trigger in room 56 which could result in a softlock
     - **Tomb of Tihocan**: missing trigger in room 62 for enemy 34
-    - **City of Khamoon**: incorrect trapdoor trigger types in rooms 31 and 34
+    - **City of Khamoon**: incorrect trapdoor trigger types in rooms 31 and 34, and missing trapdoor triggers in rooms 10 and 18
     - **Obelisk of Khamoon**: missing switch trigger type in room 66
     - **Natla's Mines**: incorrect flipmap indices in room 85
     - **Atlantean Stronghold**: fixed poorly configured portals between rooms 74 and 12