Don't remove items twice (#4524)

* Don't remove items twice

src/Mobs/Cow.cpp

@@ -47,7 +47,7 @@ void cCow::OnRightClicked(cPlayer & a_Player)
 		if (!a_Player.IsGameModeCreative())
 		{
 			a_Player.GetInventory().RemoveOneEquippedItem();
-			a_Player.GetInventory().AddItem(E_ITEM_MILK);
+			a_Player.GetInventory().AddItem(cItem(E_ITEM_MILK));
 		}
 	}
 }