bug 242378 restore #include that got lost with the relicensing

patch by Isaac Hwak Han <isaachh@mailc.net> r=gerv sr=cls

widget/src/build/widget.rc

@@ -1,5 +1,4 @@
 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 */
-/* ***** BEGIN LICENSE BLOCK *****
 /* ***** BEGIN LICENSE BLOCK *****
  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  *
@@ -35,6 +34,8 @@
  * the terms of any one of the MPL, the GPL or the LGPL.
  *
  * ***** END LICENSE BLOCK ***** */
+
+#include "resource.h"
 #include <winresrc.h>
 #include <dlgs.h>