Fixed Network Tool crashing on null ItemStacks.

src/main/java/appeng/parts/p2p/PartP2PTunnelME.java

@@ -63,7 +63,7 @@ public class PartP2PTunnelME extends PartP2PTunnel<PartP2PTunnelME> implements I
 	}
 
 	private final Connections connection = new Connections( this );
-	private final AENetworkProxy outerProxy = new AENetworkProxy( this, "outer", null, true );
+	private final AENetworkProxy outerProxy = new AENetworkProxy( this, "outer", ItemStack.EMPTY, true );
 
 	public PartP2PTunnelME( final ItemStack is )
 	{