creature: set TR1 enemy room number above position

This uses the same approach as TR2 to set an enemy's room number
slightly above their position, so that one click water does not produce
a tint and to allow sound effects to play.

Resolves #2753.

docs/tr1/CHANGELOG.md

@@ -13,6 +13,7 @@
 - fixed mesh faces not being drawn under some circumstances (#2452, #2438)
 - fixed objects disappearing too early around screen edges (#2005)
 - fixed the trapezoid filter being toggled if Alt-F4 (either left or right) is used to close the game (#2690)
+- fixed enemies in one-click high water appearing with a water tint, and not making any animation sounds (#2753)
 - fixed a crash when 3D pickups are disabled and Lara crosses a trigger to look at a pickup item (#2711, regression from 4.8)
 - fixed trapezoid filter warping on faces close to the camera (#2629, regression from 4.9)
 - fixed Mac builds crashing upon start (regression from 4.9)

src/libtrx/game/creature/common.c

@@ -912,10 +912,13 @@ bool Creature_Animate(
         item->rot.x = 0;
     }
 
-    if (TR_VERSION >= 2 && !Object_IsType(item->object_id, g_WaterObjects)) {
+    if (!Object_IsType(item->object_id, g_WaterObjects)) {
+        // Get the room just above the enemy so that if it is in one-click high
+        // water, its effects behave still as though in a dry room.
         Room_GetSector(
             item->pos.x, item->pos.y - (STEP_L * 2), item->pos.z, &room_num);
-        if (Room_Get(room_num)->flags & RF_UNDERWATER) {
+        if (TR_VERSION >= 2
+            && (Room_Get(room_num)->flags & RF_UNDERWATER) != 0) {
             item->hit_points = 0;
         }
     }