Prevent tiles with objects on them from falling.

src/player.c

@@ -293,11 +293,16 @@ move(Player *player, RoomMatrix *matrix, Vector2d direction)
 
 	if (!has_collided(player, matrix, direction)) {
 		action_spent(player);
+		RoomSpace *lastSpace = &matrix->spaces[lastPos.x][lastPos.y];
 		if (lastPos.x > 1 &&
 		    lastPos.y > 1 &&
 		    lastPos.x < 14 &&
-		    lastPos.y < 10)
+		    lastPos.y < 10 &&
-			map_trigger_tile_fall(matrix->spaces[lastPos.x][lastPos.y].tile);
+		    lastSpace->decoration == NULL &&
+		    lastSpace->trap == NULL &&
+		    lastSpace->objects == NULL
+		    )
+			map_trigger_tile_fall(lastSpace->tile);
 	}
 }
 

src/roommatrix.c

@@ -47,6 +47,7 @@ roommatrix_reset(RoomMatrix *m)
 			space->player = NULL;
 			space->trap = NULL;
 			space->tile = NULL;
+			space->decoration = NULL;
 			while (space->items != NULL)
 				linkedlist_pop(&space->items);
 			while (space->artifacts != NULL)
@@ -126,6 +127,7 @@ void roommatrix_populate_from_map(RoomMatrix *rm, Map *m)
 					r->tiles[i][j]->lethal;
 			}
 			if (r->decorations[i][j]) {
+				space->decoration = r->decorations[i][j];
 				space->occupied |=
 					r->decorations[i][j]->collider;
 				space->lightsource |=

src/roommatrix.h

@@ -45,6 +45,7 @@ typedef struct RoomSpace {
 	bool damaging;
 	int light;
 	MapTile *tile;
+	MapTile *decoration;
 	Monster *monster;
 	Player *player;
 	Trap *trap;