[pitivi/ges: 10/287] GES : make sure the position callback doesn't fail

[Jean-FranÃois Fortin Tam <jfft src gnome org>]

commit b071ec4bc18a099d72403bcf17920efbd421016a
Author: Mathieu Duponchelle <seeed laposte net>
Date:   Wed Jul 20 09:11:37 2011 +0200

    GES : make sure the position callback doesn't fail

 pitivi/ui/viewer.py |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/pitivi/ui/viewer.py b/pitivi/ui/viewer.py
index 857370d..eb375bc 100644
--- a/pitivi/ui/viewer.py
+++ b/pitivi/ui/viewer.py
@@ -611,7 +611,10 @@ class PitiviViewer(gtk.VBox, Loggable):
     def _posCb(self):
         if not self.playing :
             return False
-        position = self.pipeline.query_position(gst.FORMAT_TIME)[0]
+        try:
+            position = self.pipeline.query_position(gst.FORMAT_TIME)[0]
+        except:
+            return True
         self._newTime(position)
         self.app.gui.timeline._canvas.timelinePositionChanged(position)
         return True