Merge pull request #3 from mics8128/master

FIX item duplication bug for shrinking backpack size.

src/at/pcgamingfreaks/MinePacks/Backpack.java

@@ -103,6 +103,7 @@ public void open(Player p, boolean editable)
 						if (i != null)
 						{
 							player.getWorld().dropItemNaturally(player.getLocation(), i);
+                            hasChanged = true;
 						}
 					}
 				}