[pitivi] undo: Always commit the timeline on Clip property change when undoing

[Thibault Saunier <tsaunier src gnome org>]

commit 164f7a7f6bc15c0d8c95fdffe420408d49476192
Author: Thibault Saunier <tsaunier gnome org>
Date:   Mon Dec 1 01:00:47 2014 +0100

    undo: Always commit the timeline on Clip property change when undoing
    
    Otherwise the timeline won't be updated and the user will not see any
    change from the undone/redone action

 pitivi/undo/timeline.py |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/pitivi/undo/timeline.py b/pitivi/undo/timeline.py
index a7f2709..742576e 100644
--- a/pitivi/undo/timeline.py
+++ b/pitivi/undo/timeline.py
@@ -290,11 +290,13 @@ class ClipPropertyChanged(UndoableAction):
     def do(self):
         self.clip.set_property(
             self.property_name.replace("-", "_"), self.new_value)
+        self.clip.get_layer().get_timeline().get_asset().pipeline.commit_timeline()
         self._done()
 
     def undo(self):
         self.clip.set_property(
             self.property_name.replace("-", "_"), self.old_value)
+        self.clip.get_layer().get_timeline().get_asset().pipeline.commit_timeline()
         self._undone()