[folks] Update Kf.PersonaStore.add_persona_from_details to use defined constants

[Raul Gutierrez Segales <raulgs src gnome org>]

commit fbf1d5eebb24a53b615c1e0a564c57f8885c5e67
Author: Raul Gutierrez Segales <raul gutierrez segales collabora co uk>
Date:   Wed Mar 30 17:49:10 2011 +0100

    Update Kf.PersonaStore.add_persona_from_details to use defined constants

 backends/key-file/kf-persona-store.vala |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)
---
diff --git a/backends/key-file/kf-persona-store.vala b/backends/key-file/kf-persona-store.vala
index d67e1a1..e07b7aa 100644
--- a/backends/key-file/kf-persona-store.vala
+++ b/backends/key-file/kf-persona-store.vala
@@ -286,12 +286,18 @@ public class Folks.Backends.Kf.PersonaStore : Folks.PersonaStore
     }
 
   /**
-   * { inheritDoc}
+   * Add a new { link Persona} to the PersonaStore.
+   *
+   * Accepted keys for `details` are:
+   * - PersonaStore.detail_key (PersonaDetail.IM_ADDRESSES)
+   *
+   * See { link Folks.PersonaStore.add_persona_from_details}.
    */
   public override async Folks.Persona? add_persona_from_details (
       HashTable<string, Value?> details) throws Folks.PersonaStoreError
     {
-      unowned Value val = details.lookup ("im-addresses");
+      unowned Value val =
+        details.lookup (PersonaStore.detail_key (PersonaDetail.IM_ADDRESSES));
       unowned HashTable<string, LinkedHashSet<string>> im_addresses =
           (HashTable<string, LinkedHashSet<string>>) val.get_boxed ();