v0.3.0c: fixed some bugs relating to removing Actor.chars[], can now find mobs within a level by position too.

src/com/shatteredpixel/shatteredpixeldungeon/levels/painters/PoolPainter.java

@@ -75,7 +75,7 @@ public class PoolPainter extends Painter {
 			Piranha piranha = new Piranha();
 			do {
 				piranha.pos = room.random();
-			} while (level.map[piranha.pos] != Terrain.WATER|| Actor.findChar( piranha.pos ) != null);
+			} while (level.map[piranha.pos] != Terrain.WATER|| level.findMob( piranha.pos ) != null);
 			level.mobs.add( piranha );
 		}
 	}