remove forward struct declaration to fix HPUX/AIX/IRIX compile bustage

widget/src/gtk/nsKeyboardUtils.cpp

@@ -16,7 +16,7 @@
  * Netscape.  All Rights Reserved. 
  */
 
-#include <X11/Xlibint.h>
+#include <X11/Xlib.h>
 #ifdef HAVE_X11_XKBLIB_H
 #include <X11/XKBlib.h>
 #endif

widget/src/gtk/nsKeyboardUtils.h

@@ -20,8 +20,8 @@
 #define _NSKEYBOARDUTILS_H_
 
 extern "C" {
+#include <X11/Xlib.h>
 #include <gdk/gdk.h>
-struct XKeyEvent;
 }
 #include "prtypes.h"