[pitivi: 18/20] timeline.py: fix ripple span calculation when there is nothign to ripple

[Edward Hervey <edwardrv src gnome org>]

commit 36ff4a4a11a81e9be5a7553b86f9df4925deafdc
Author: Brandon Lewis <brandon_lewis berkeley edu>
Date:   Tue Jul 14 18:52:11 2009 -0700

    timeline.py: fix ripple span calculation when there is nothign to ripple

 pitivi/timeline/timeline.py |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/pitivi/timeline/timeline.py b/pitivi/timeline/timeline.py
index 5fc30a1..4724e39 100644
--- a/pitivi/timeline/timeline.py
+++ b/pitivi/timeline/timeline.py
@@ -1076,8 +1076,12 @@ class MoveContext(EditingContext):
             self.focus.priority, ripple)
 
         # get the span over all clips for ripple editing
-        self.ripple_span = (max((obj.start + obj.duration for obj in ripple)) -
-            self.earliest)
+
+        latest = self.latest
+        for timeline_object in ripple:
+            latest = max(latest, timeline_object.start +
+                timeline_object.duration)
+        self.ripple_span = latest - self.earliest
 
         # save default values
         self.default_originals = self._saveValues(other)