[empathy] Fix memleak in empathy_contact_invite_menu_item_new. Just calling

[Lars-Peter Clausen <larsc src gnome org>]

commit ca4f02f71b08a1f761f2313a8fb3767a137bfa72
Author: Lars-Peter Clausen <lars metafoo de>
Date:   Sun Apr 19 17:02:02 2009 +0200

    Fix memleak in empathy_contact_invite_menu_item_new. Just calling
    gtk_widget_destroy on submenu won't free it since it is floating.
---
 libempathy-gtk/empathy-contact-menu.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/libempathy-gtk/empathy-contact-menu.c b/libempathy-gtk/empathy-contact-menu.c
index f311b12..ed46d9a 100644
--- a/libempathy-gtk/empathy-contact-menu.c
+++ b/libempathy-gtk/empathy-contact-menu.c
@@ -395,7 +395,9 @@ empathy_contact_invite_menu_item_new (EmpathyContact *contact)
 		gtk_menu_item_set_submenu (GTK_MENU_ITEM (item), submenu);
 	} else {
 		gtk_widget_set_sensitive (item, FALSE);
-		gtk_widget_destroy (submenu);
+        g_object_ref_sink (submenu);
+        gtk_widget_destroy (submenu);
+		g_object_unref (submenu);
 	}
 
 	gtk_widget_show (image);