v0.2.2: corrected casting errors in javac compiler

src/com/shatteredpixel/shatteredpixeldungeon/items/Heap.java

@@ -341,7 +341,7 @@ public class Heap implements Bundlable {
 	public void restoreFromBundle( Bundle bundle ) {
 		pos = bundle.getInt( POS );
 		type = Type.valueOf( bundle.getString( TYPE ) );
-		items = new LinkedList<Item>( (Collection<? extends Item>) bundle.getCollection( ITEMS ) );
+        items = new LinkedList<Item>( (Collection<Item>) ((Collection<?>) bundle.getCollection( ITEMS )) );
         items.removeAll(Collections.singleton(null));
 	}