[gedit-collaboration] Make sure to chain up dispose

[Jesse van den Kieboom <jessevdk src gnome org>]

commit 1d41b514973b1596d0573e058efcdd8a83dcfe33
Author: Jesse van den Kieboom <jesse vandenkieboom epfl ch>
Date:   Sun Apr 3 17:07:25 2011 +0200

    Make sure to chain up dispose

 src/gedit-collaboration-window-helper.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/gedit-collaboration-window-helper.c b/src/gedit-collaboration-window-helper.c
index c289c20..a61b9eb 100644
--- a/src/gedit-collaboration-window-helper.c
+++ b/src/gedit-collaboration-window-helper.c
@@ -347,6 +347,8 @@ gedit_collaboration_window_helper_dispose (GObject *object)
 		g_object_unref (helper->priv->manager);
 		helper->priv->manager = NULL;
 	}
+
+	G_OBJECT_CLASS (gedit_collaboration_window_helper_parent_class)->dispose (object);
 }
 
 static void