tpf-persona-store: call _emit_personas_changed() when reseting _persona_set

We need to notify when we reset the persona set.

https://bugzilla.gnome.org/show_bug.cgi?id=683390Signed-off-by: Jeremy Whiting <jpwhiting@kde.org>

NEWS

@@ -18,6 +18,7 @@ Bugs fixed:
 • Bug 681726 — empathy crashed with SIGABRT in g_assertion_message()
 • Bug 683452 — gnome-contacts starts up with an empty address book
 • Bug 681476 — folks-inspect could use some methods to set values
+• Bug 683390 — Individuals sometimes not removed when disabling their Telepathy account
 
 API changes:
 • Add PropertyError.UNAVAILABLE

backends/telepathy/lib/tpf-persona-store.vala

@@ -395,6 +395,8 @@ public class Tpf.PersonaStore : Folks.PersonaStore
       else
         this.trust_level = PersonaStoreTrust.PARTIAL;
 
+      this._emit_personas_changed (null, this._persona_set);
+
       this._personas = new HashMap<string, Persona> ();
       this._personas_ro = this._personas.read_only_view;
       this._persona_set = new HashSet<Persona> ();