From 2e43f9b45baf241ebc0802c1c974d93bffd8306c Mon Sep 17 00:00:00 2001
From: AlgorithmX2 <AlgorithmX2@gmail.com>
Date: Sat, 12 Jul 2014 15:50:50 -0500
Subject: [PATCH] Null Check Interface.

---
 helpers/DualityInterface.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/helpers/DualityInterface.java b/helpers/DualityInterface.java
index 155dc3a1..662f0133 100644
--- a/helpers/DualityInterface.java
+++ b/helpers/DualityInterface.java
@@ -474,7 +474,7 @@ public class DualityInterface implements IGridTickable, ISegmentedInventory, ISt
 	{
 		try
 		{
-			if ( getInstalledUpgrades( Upgrades.CRAFTING ) > 0 )
+			if ( getInstalledUpgrades( Upgrades.CRAFTING ) > 0 && itemStack != null )
 			{
 				return craftingTracker.handleCrafting( x, itemStack.getStackSize(), itemStack, d, getTile().getWorldObj(), gridProxy.getGrid(),
 						gridProxy.getCrafting(), mySrc );