libxul-1.9.2.26 and gcc 4.6

[Andriy Gapon]

The following patch seems to be required to build libxul-1.9.2.26 with gcc 4.6.X:
--- gfx/ots/src/os2.cc.orig	2012-02-01 23:05:19.933087647 +0200
+++ gfx/ots/src/os2.cc	2012-02-01 23:09:48.507582408 +0200
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

+#include <stddef.h>
+
 #include "os2.h"

 #include "head.h"

-- 
Andriy Gapon