[folks] telepathy: Fix use of deprecated telepathy-glib API

[Philip Withnall <pwithnall src gnome org>]

commit 016b1059e61cabe18ecd150989a3e80de51bccd9
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Tue Feb 3 15:36:42 2015 +0000

    telepathy: Fix use of deprecated telepathy-glib API
    
    get_valid_accounts() was deprecated in 0.19.9.

 backends/telepathy/tp-backend.vala |    6 ++----
 1 files changed, 2 insertions(+), 4 deletions(-)
---
diff --git a/backends/telepathy/tp-backend.vala b/backends/telepathy/tp-backend.vala
index 4c4cb95..bc80012 100644
--- a/backends/telepathy/tp-backend.vala
+++ b/backends/telepathy/tp-backend.vala
@@ -84,8 +84,7 @@ public class Folks.Backends.Tp.Backend : Folks.Backend
       PersonaStore[] removed_stores = {};
 
       /* First handle adding any missing persona stores. */
-      GLib.List<unowned Account> accounts =
-        this._account_manager.get_valid_accounts ();
+      var accounts = this._account_manager.dup_valid_accounts ();
       foreach (Account account in accounts)
         {
           string id = account.get_object_path ();
@@ -175,8 +174,7 @@ public class Folks.Backends.Tp.Backend : Folks.Backend
           this._account_manager.account_validity_changed.connect (
               this._account_validity_changed_cb);
 
-          GLib.List<unowned Account> accounts =
-          this._account_manager.get_valid_accounts ();
+          var accounts = this._account_manager.dup_valid_accounts ();
           foreach (Account account in accounts)
             {
               this._account_enabled_cb (account);