v0.8.2c: added a check to prevent collecting items with no quantity

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/items/Item.java

@@ -169,6 +169,10 @@ public class Item implements Bundlable {
 	
 	public boolean collect( Bag container ) {
 
+		if (quantity <= 0){
+			return true;
+		}
+
 		ArrayList<Item> items = container.items;
 
 		for (Item item:items) {