[Freeze break request] a simple vinagre patch

[Bastien Nocera <hadess hadess net>]

If you tried to activate mDNS bookmarks in vinagre, you'd get:
(vinagre:5842): GLib-GObject-CRITICAL **: g_value_get_object: assertion `G_VALUE_HOLDS_OBJECT (value)' failed

** (vinagre:5842): CRITICAL **: vinagre_bookmarks_entry_get_node: assertion `VINAGRE_IS_BOOKMARKS_ENTRY (entry)' failed

** (vinagre:5842): CRITICAL **: fav_panel_activated: assertion `vinagre_bookmarks_entry_get_node (entry) == VINAGRE_BOOKMARKS_ENTRY_NODE_CONN' failed

The patch is at:
http://bugzilla-attachments.gnome.org/attachment.cgi?id=143462
And the bug:
https://bugzilla.gnome.org/show_bug.cgi?id=581817

A bit too quick on the keyboard, I already committed the fix to master
and gnome-2-26. So this is a request not to revert ;)

Cheers