[pygtk] Plug a huge leak in gtk.Widget.get_snapshot()

[Paul Pogonyshev <paulp src gnome org>]

commit 3fb3606d803b49e30f4fd492a61f685d6c1540ac
Author: Benjamin Berg <benjamin sipsolutions net>
Date:   Tue Oct 6 21:46:44 2009 +0300

    Plug a huge leak in gtk.Widget.get_snapshot()
    
    Bug #596612.

 gtk/gtk-2.14.defs |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtk-2.14.defs b/gtk/gtk-2.14.defs
index 5b46421..752be94 100644
--- a/gtk/gtk-2.14.defs
+++ b/gtk/gtk-2.14.defs
@@ -907,6 +907,7 @@
   (of-object "GtkWidget")
   (c-name "gtk_widget_get_snapshot")
   (return-type "GdkPixmap*")
+  (caller-owns-return #t)
   (parameters
     '("GdkRectangle*" "clip_rect" (null-ok) (default "NULL"))
   )