From 85316e16f3053a96dcf925d55a727ce676c07124 Mon Sep 17 00:00:00 2001
From: Krapht <kraphteu@gmail.com>
Date: Thu, 5 Jul 2012 18:27:46 +0200
Subject: [PATCH] Check that we have a quarry arm before trying to tell it what
 to do

---
 common/net/minecraft/src/buildcraft/factory/TileQuarry.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/common/net/minecraft/src/buildcraft/factory/TileQuarry.java b/common/net/minecraft/src/buildcraft/factory/TileQuarry.java
index ecae9845..9b252018 100644
--- a/common/net/minecraft/src/buildcraft/factory/TileQuarry.java
+++ b/common/net/minecraft/src/buildcraft/factory/TileQuarry.java
@@ -291,7 +291,7 @@ public class TileQuarry extends TileMachine implements IArmListener, IMachine, I
 						if (blockDig(blockId)) {
 							blockedColumns[searchX][searchZ] = true;
 						} else if (canDig(blockId)) {
-							if (doSet) {
+							if (doSet && arm != null) {
 								arm.setTarget(bx, by + 1, bz);
 
 								targetX = (int) arm.targetX;