[folks] Access static class members through class, not instance.

[Travis Reitter <treitter src gnome org>]

commit aef8ef6b2d7a1733c8ca567a820cbfb5a620d6c0
Author: Travis Reitter <travis reitter collabora co uk>
Date:   Mon Aug 13 09:51:09 2012 -0700

    Access static class members through class, not instance.
    
    This covers the libsocialweb backend.
    
    Helps: https://bugzilla.gnome.org/show_bug.cgi?id=681420

 backends/libsocialweb/lib/swf-persona-store.vala |    2 +-
 backends/libsocialweb/lib/swf-persona.vala       |   10 +++++-----
 2 files changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/backends/libsocialweb/lib/swf-persona-store.vala b/backends/libsocialweb/lib/swf-persona-store.vala
index e577867..f23f414 100644
--- a/backends/libsocialweb/lib/swf-persona-store.vala
+++ b/backends/libsocialweb/lib/swf-persona-store.vala
@@ -124,7 +124,7 @@ public class Swf.PersonaStore : Folks.PersonaStore
    */
   public override string[] always_writeable_properties
     {
-      get { return this._always_writeable_properties; }
+      get { return Swf.PersonaStore._always_writeable_properties; }
     }
 
   /*
diff --git a/backends/libsocialweb/lib/swf-persona.vala b/backends/libsocialweb/lib/swf-persona.vala
index fd5511e..177b1db 100644
--- a/backends/libsocialweb/lib/swf-persona.vala
+++ b/backends/libsocialweb/lib/swf-persona.vala
@@ -59,7 +59,7 @@ public class Swf.Persona : Folks.Persona,
    */
   public override string[] linkable_properties
     {
-      get { return this._linkable_properties; }
+      get { return Swf.Persona._linkable_properties; }
     }
 
   /**
@@ -69,7 +69,7 @@ public class Swf.Persona : Folks.Persona,
    */
   public override string[] writeable_properties
     {
-      get { return this._writeable_properties; }
+      get { return Swf.Persona._writeable_properties; }
     }
 
   private LoadableIcon? _avatar = null;
@@ -260,8 +260,8 @@ public class Swf.Persona : Folks.Persona,
   public Persona (PersonaStore store, Contact contact)
     {
       var id = get_contact_id (contact);
-      var uid = this.build_uid (BACKEND_NAME, store.id, id);
-      var iid = this._build_iid (store.id, id);
+      var uid = Folks.Persona.build_uid (BACKEND_NAME, store.id, id);
+      var iid = Swf.Persona._build_iid (store.id, id);
 
       Object (display_id: id,
               uid: uid,
@@ -277,7 +277,7 @@ public class Swf.Persona : Folks.Persona,
           this.uid, this.store.display_name, this.display_id, this);
 
       var facebook_jid =
-          this._build_facebook_jid (this.store.id, this.display_id);
+          Swf.Persona._build_facebook_jid (this.store.id, this.display_id);
       if (facebook_jid != null)
         {
           try