[pitivi] Seeker: Properly handle exceptions when seeking

[Edward Hervey <edwardrv src gnome org>]

commit b16f039e3a21d57e85a7b9b9515d34e4ec01c6d6
Author: Edward Hervey <bilboed bilboed com>
Date:   Sat Jul 10 14:00:55 2010 +0200

    Seeker: Properly handle exceptions when seeking
    
    If ever an exception was raised when doing a seek, we would end up
    in a unknown state (making all following seeks fail).
    
    Also add a error message for the failing seek

 pitivi/utils.py |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)
---
diff --git a/pitivi/utils.py b/pitivi/utils.py
index 93c6448..1cb0c38 100644
--- a/pitivi/utils.py
+++ b/pitivi/utils.py
@@ -311,7 +311,14 @@ class Seeker(Signallable):
         if self.position != None and self.format != None:
             position, self.position = self.position, None
             format, self.format = self.format, None
-            self.emit('seek', position, format)
+            try:
+                self.emit('seek', position, format)
+            except:
+                log.doLog(log.ERROR, None, "seeker", "Error while seeking to position:%s format:%r",
+                          (gst.TIME_ARGS(position), format))
+                # if an exception happened while seeking, properly
+                # reset ourselves
+                return False
         return False
 
 def get_filesystem_encoding():