Add volatile to be sure the JVM wont cache the value

CraftBukkit-Patches/0026-Netty.patch

@@ -1,4 +1,4 @@
-From 2157375faa240c2018b84e0d3f421fe9c9c10917 Mon Sep 17 00:00:00 2001
+From 16294b7515b83c209c7160e9966fce2fa8dc84e0 Mon Sep 17 00:00:00 2001
 From: md_5 <md_5@live.com.au>
 Date: Sun, 3 Feb 2013 10:24:33 +1100
 Subject: [PATCH] Netty
@@ -199,7 +199,7 @@ index 0000000..cfc0535
 +}
 diff --git a/src/main/java/org/spigotmc/netty/NettyNetworkManager.java b/src/main/java/org/spigotmc/netty/NettyNetworkManager.java
 new file mode 100644
-index 0000000..3801c0e
+index 0000000..46493ef
 --- /dev/null
 +++ b/src/main/java/org/spigotmc/netty/NettyNetworkManager.java
 @@ -0,0 +1,224 @@
@@ -240,7 +240,7 @@ index 0000000..3801c0e
 +    private static final NettyServerConnection serverConnection = (NettyServerConnection) server.ae();
 +    /*========================================================================*/
 +    static final int LEGACY_PING_TIME = 1000;
-+    Packet254GetInfo pingRequest;
++    volatile Packet254GetInfo pingRequest;
 +    long lastPingRead;
 +    /*========================================================================*/
 +    private Queue<Packet> syncPackets = new ConcurrentLinkedQueue<Packet>();