Corrected wxGTK.spec as per 2.1.14 (hadn't commited),

Removed include "gtk.h" from the public pen.h header and
     added check for this to configure etc.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_2_BRANCH@6906 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/defs.h

@@ -1862,6 +1862,8 @@ typedef unsigned long   Atom;  /* this might fail on a few architectures */
 
 #ifdef __WXGTK__
 /* Stand-ins for GLIB types */
+typedef char           gchar;
+typedef signed char    gint8;
 typedef int            gint;
 typedef unsigned       guint;
 typedef unsigned long  gulong;