Reverted changes to getItem(). Will be reimplemented after RB.

src/main/java/org/bukkit/craftbukkit/inventory/CraftInventory.java

@@ -27,7 +27,7 @@ public class CraftInventory implements org.bukkit.inventory.Inventory {
     }
 
     public ItemStack getItem(int index) {
-        return (getInventory().getItem(index) == null || getInventory().getItem(index).id == 0) ? null : new CraftItemStack(getInventory().getItem(index));
+        return new CraftItemStack(getInventory().getItem(index));
     }
 
     public ItemStack[] getContents() {