v3.1.0: fixed sad ghost rarely spawning in non-open spaces

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/npcs/Ghost.java

@@ -306,7 +306,7 @@ public class Ghost extends NPC {
 				Ghost ghost = new Ghost();
 				do {
 					ghost.pos = level.pointToCell(room.random());
-				} while (ghost.pos == -1 || level.solid[ghost.pos] || ghost.pos == level.exit());
+				} while (ghost.pos == -1 || level.solid[ghost.pos] || !level.openSpace[ghost.pos] || ghost.pos == level.exit());
 				level.mobs.add( ghost );
 				
 				spawned = true;