[folks] Add a missing signal disconnection to Tr.Backend

[Philip Withnall <pwithnall src gnome org>]

commit ebe1339328b458db6ecd85d41a9472849b8088eb
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Fri Apr 22 22:13:42 2011 +0100

    Add a missing signal disconnection to Tr.Backend
    
    Helps: bgo#645186

 backends/tracker/tr-backend.vala |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/backends/tracker/tr-backend.vala b/backends/tracker/tr-backend.vala
index 1dbe4fc..09f4178 100644
--- a/backends/tracker/tr-backend.vala
+++ b/backends/tracker/tr-backend.vala
@@ -114,6 +114,7 @@ public class Folks.Backends.Tr.Backend : Folks.Backend
 
   private void _store_removed_cb (Folks.PersonaStore store)
     {
+      store.removed.disconnect (this._store_removed_cb);
       this.persona_store_removed (store);
       this.persona_stores.unset (store.id);
     }