From 786fdfb9fed75ebabfb4648a824ff39de91fbc35 Mon Sep 17 00:00:00 2001
From: Tahg <tahgtahv@gmail.com>
Date: Fri, 11 Mar 2011 00:36:19 -0500
Subject: [PATCH] NPE fix in redstone

---
 src/main/java/net/minecraft/server/BlockRedstoneWire.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/java/net/minecraft/server/BlockRedstoneWire.java b/src/main/java/net/minecraft/server/BlockRedstoneWire.java
index e312fa84f6..88dda17bbd 100644
--- a/src/main/java/net/minecraft/server/BlockRedstoneWire.java
+++ b/src/main/java/net/minecraft/server/BlockRedstoneWire.java
@@ -280,7 +280,7 @@ public class BlockRedstoneWire extends Block {
             if (!flag) {
                 this.b_(world, i, j, k, i1);
                 world.e(i, j, k, 0);
-            } else if(Block.byId[l].c() || Block.DIODE_OFF.id == l && Block.DIODE_ON.id == l) { //condition added by Craftbukkit
+            } else if((Block.byId[l] != null && Block.byId[l].c()) || Block.DIODE_OFF.id == l && Block.DIODE_ON.id == l) { //condition added by Craftbukkit
                 this.g(world, i, j, k);
             }