This patch is extracted from
http://mail.gnome.org/archives/gtkmm-list/2003-September/msg00016.html


--- gnomemm-1.2.4.orig/src/gnome--/app-helper.h
+++ gnomemm-1.2.4/src/gnome--/app-helper.h
@@ -261,6 +261,7 @@
     { return static_cast<T_Info&>(begin_[n]); }
 
   GnomeUIInfo* gtkobj() const 
-    { return static_cast<GnomeUIInfo*>(data_); }
+    //{ return static_cast<GnomeUIInfo*>(data_); }
+    { return (GnomeUIInfo*)(data_); }
 
   vector<Info> make_return_vector(); //Used by get_uitree().
   vector<SubTree> make_return_vector_subtrees(); //Used by Gnome::App.