[folks] Fix groups signal emissions in Tpf.Persona

[Philip Withnall <pwithnall src gnome org>]

commit 450e7f20e9df7167303c526786ab355eaf305463
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Wed Aug 25 16:54:10 2010 +0100

    Fix groups signal emissions in Tpf.Persona

 backends/telepathy/tpf-persona.vala |   11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)
---
diff --git a/backends/telepathy/tpf-persona.vala b/backends/telepathy/tpf-persona.vala
index 603943b..c54085c 100644
--- a/backends/telepathy/tpf-persona.vala
+++ b/backends/telepathy/tpf-persona.vala
@@ -133,6 +133,11 @@ public class Tpf.Persona : Folks.Persona,
               if (value.lookup (group) == false)
                 this._change_group (group, true);
             });
+
+          /* Since we're only changing the members of this._groups, rather than
+           * replacing it with a new instance, we have to manually emit the
+           * notification. */
+          this.notify_property ("groups");
         }
     }
 
@@ -144,10 +149,7 @@ public class Tpf.Persona : Folks.Persona,
       if (_change_group (group, is_member))
         {
           Tpf.PersonaStore store = (Tpf.PersonaStore) this.store;
-
           yield store.change_group_membership (this, group, is_member);
-
-          this.group_changed (group, is_member);
         }
     }
 
@@ -166,6 +168,9 @@ public class Tpf.Persona : Folks.Persona,
       else
         changed = this._groups.remove (group);
 
+      if (changed == true)
+        this.group_changed (group, is_member);
+
       return changed;
     }