[pygtk] gtk.AboutDialog.set_program_name() should accept None just like gtk.AboutDialog.set_name()

[John Stowers <jstowers src gnome org>]

commit b790e231a73414cfec713de816e03a2fb2645cf5
Author: Dieter Verfaillie <dieterv optionexplicit be>
Date:   Wed Feb 16 17:10:59 2011 +0100

    gtk.AboutDialog.set_program_name() should accept None just like gtk.AboutDialog.set_name()

 gtk/gtk-2.12.defs |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtk-2.12.defs b/gtk/gtk-2.12.defs
index 3639e5f..a2e3ed0 100644
--- a/gtk/gtk-2.12.defs
+++ b/gtk/gtk-2.12.defs
@@ -360,7 +360,7 @@
   (c-name "gtk_about_dialog_set_program_name")
   (return-type "none")
   (parameters
-    '("const-gchar*" "name")
+    '("const-gchar*" "name" (null-ok))
   )
 )