[dia] Stop complaints about group named 'gtk'

[Hans Breuer <hans src gnome org>]

commit 4bb946877f8db2ec87c20d0f77ee02e84f7519de
Author: Hans Breuer <hans breuer org>
Date:   Sat Aug 14 19:52:00 2010 +0200

    Stop complaints about group named 'gtk'
    
    The GNOME build was adding the gtk option context group twice.
    Once as a side-effect of gnome_program_init() and once explicit.
    Remove the latter when building with GNOME.

 app/app_procs.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/app/app_procs.c b/app/app_procs.c
index 7e85ad4..afa19c8 100644
--- a/app/app_procs.c
+++ b/app/app_procs.c
@@ -756,8 +756,10 @@ app_init (int argc, char **argv)
 
   context = g_option_context_new(_("[FILE...]"));
   g_option_context_add_main_entries (context, options, GETTEXT_PACKAGE);
+#ifndef HAVE_GNOME
+  /* avoid to add it a second time */
   g_option_context_add_group (context, gtk_get_option_group (FALSE));
-
+#endif
   if (argv) {
     GError *error = NULL;