[empathy: 4/7] Only check for presence in presence-enabled personas 2.0

[Emilio Pozuelo Monfort <epm src gnome org>]

commit 3889df3fdf5964f32a96912cee0c5b02e7bcfb58
Author: Emilio Pozuelo Monfort <emilio pozuelo collabora co uk>
Date:   Mon Nov 15 17:57:27 2010 +0100

    Only check for presence in presence-enabled personas 2.0

 libempathy-gtk/empathy-individual-widget.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/libempathy-gtk/empathy-individual-widget.c b/libempathy-gtk/empathy-individual-widget.c
index 72acfd8..863ce02 100644
--- a/libempathy-gtk/empathy-individual-widget.c
+++ b/libempathy-gtk/empathy-individual-widget.c
@@ -220,7 +220,13 @@ update_weak_contact (EmpathyIndividualWidget *self)
       personas = folks_individual_get_personas (priv->individual);
       for (l = personas; l != NULL; l = l->next)
         {
-          FolksPresence *presence = FOLKS_PRESENCE (l->data);
+          FolksPresence *presence;
+
+          /* We only want personas which implement FolksPresence */
+          if (!FOLKS_IS_PRESENCE (l->data))
+            continue;
+
+          presence = FOLKS_PRESENCE (l->data);
 
           if (folks_presence_typecmp (folks_presence_get_presence_type (presence),
                   presence_type) > 0