From 686807e387f47869c60983301050caaa069a7a82 Mon Sep 17 00:00:00 2001
From: feildmaster <admin@feildmaster.com>
Date: Thu, 20 Dec 2012 10:45:12 -0600
Subject: [PATCH] Filter invalid ItemStacks from Packets.

Invalid ItemStacks are causing Fireworks to disconnect players and
prevent them from reconnecting
---
 src/main/java/net/minecraft/server/Packet.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/java/net/minecraft/server/Packet.java b/src/main/java/net/minecraft/server/Packet.java
index a754da985f..7472d44107 100644
--- a/src/main/java/net/minecraft/server/Packet.java
+++ b/src/main/java/net/minecraft/server/Packet.java
@@ -210,7 +210,7 @@ public abstract class Packet {
     }
 
     public static void a(ItemStack itemstack, DataOutputStream dataoutputstream) throws IOException { // CraftBukkit - throws IOException
-        if (itemstack == null) {
+        if (itemstack == null || itemstack.getItem() == null) { // CraftBukkit - NPE fix itemstack.getItem()
             dataoutputstream.writeShort(-1);
         } else {
             dataoutputstream.writeShort(itemstack.id);