[folks] Access detail_key via `this` since its an instance method

[Raul Gutierrez Segales <raulgs src gnome org>]

commit 8435b42f7a0cb1cb09cdf42ce172420dc9f0a60e
Author: Raul Gutierrez Segales <raul gutierrez segales collabora co uk>
Date:   Thu Mar 31 15:37:21 2011 +0100

    Access detail_key via `this` since its an instance method

 backends/key-file/kf-persona-store.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/backends/key-file/kf-persona-store.vala b/backends/key-file/kf-persona-store.vala
index e07b7aa..94c3769 100644
--- a/backends/key-file/kf-persona-store.vala
+++ b/backends/key-file/kf-persona-store.vala
@@ -297,7 +297,7 @@ public class Folks.Backends.Kf.PersonaStore : Folks.PersonaStore
       HashTable<string, Value?> details) throws Folks.PersonaStoreError
     {
       unowned Value val =
-        details.lookup (PersonaStore.detail_key (PersonaDetail.IM_ADDRESSES));
+        details.lookup (this.detail_key (PersonaDetail.IM_ADDRESSES));
       unowned HashTable<string, LinkedHashSet<string>> im_addresses =
           (HashTable<string, LinkedHashSet<string>>) val.get_boxed ();