[empathy] Cope with tpl_event_get_receiver() returning NULL

[Emilio Pozuelo Monfort <epm src gnome org>]

commit c8beb5910b162e26e94c13a57d7d3213f9a3ef84
Author: Emilio Pozuelo Monfort <emilio pozuelo collabora co uk>
Date:   Fri Jun 10 12:47:56 2011 +0100

    Cope with tpl_event_get_receiver() returning NULL

 libempathy-gtk/empathy-log-window.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/libempathy-gtk/empathy-log-window.c b/libempathy-gtk/empathy-log-window.c
index ef004b4..eee79ff 100644
--- a/libempathy-gtk/empathy-log-window.c
+++ b/libempathy-gtk/empathy-log-window.c
@@ -611,6 +611,9 @@ is_same_confroom (TplEvent *e1,
   TplEntity *receiver2 = tpl_event_get_receiver (e2);
   TplEntity *room1, *room2;
 
+  if (receiver1 == NULL || receiver2 == NULL)
+    return FALSE;
+
   if (tpl_entity_get_entity_type (sender1) == TPL_ENTITY_ROOM)
     room1 = sender1;
   else if (tpl_entity_get_entity_type (receiver1) == TPL_ENTITY_ROOM)