[empathy/gnome-2-34] call-observer: return from ObserveChannels() if the channel was already invalidated

[Guillaume Desmottes <gdesmott src gnome org>]

commit e6016c3d672c0ea95170271d703733730d256b3f
Author: Guillaume Desmottes <guillaume desmottes collabora co uk>
Date:   Tue Mar 8 15:47:26 2011 +0100

    call-observer: return from ObserveChannels() if the channel was already invalidated

 src/empathy-call-observer.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/empathy-call-observer.c b/src/empathy-call-observer.c
index 8edb38a..dba191a 100644
--- a/src/empathy-call-observer.c
+++ b/src/empathy-call-observer.c
@@ -175,6 +175,8 @@ observe_channels (TpSimpleObserver *observer,
     {
       DEBUG ("The channel has already been invalidated: %s",
           error->message);
+
+      tp_observe_channels_context_fail (context, error);
       return;
     }