[pitivi] elements: Make sure to commit the timeline on each ControlSource changes

[Alexandru Băluț <alexbalut src gnome org>]

commit b641170cfe0dec0063d699e14c5151188aba7144
Author: Thibault Saunier <tsaunier gnome org>
Date:   Tue Feb 9 15:25:46 2016 +0100

    elements: Make sure to commit the timeline on each ControlSource changes
    
    Making the visual changes 'real time'
    
    Differential Revision: https://phabricator.freedesktop.org/D751

 pitivi/timeline/elements.py |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/pitivi/timeline/elements.py b/pitivi/timeline/elements.py
index 6e6c1f6..2b1dd0a 100644
--- a/pitivi/timeline/elements.py
+++ b/pitivi/timeline/elements.py
@@ -215,6 +215,7 @@ class KeyframeCurve(FigureCanvas, Loggable):
     # Callbacks
     def __controlSourceChangedCb(self, unused_control_source, unused_timed_value):
         self.__updatePlots()
+        self.__timeline.bTimeline.get_parent().commit_timeline()
 
     def __gtkMotionEventCb(self, unused_widget, unused_event):
         """