[pitivi: 2/4] Don't allow clip start times to go < 0.

[Edward Hervey <edwardrv src gnome org>]

commit eaeffc31edc4bb6a6f502cba729209eb112f14bb
Author: Alessandro Decina <alessandro d gmail com>
Date:   Sun Jul 26 18:45:23 2009 +0200

    Don't allow clip start times to go < 0.

 pitivi/timeline/timeline.py |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/pitivi/timeline/timeline.py b/pitivi/timeline/timeline.py
index bc93fff..25b895f 100644
--- a/pitivi/timeline/timeline.py
+++ b/pitivi/timeline/timeline.py
@@ -1066,6 +1066,7 @@ class MoveContext(EditingContext):
                 self.timeline_objects)
 
         self.min_priority = focus.priority - min_priority
+        self.min_position = focus.start - earliest
 
         # get the span over all clips for edge snapping
         self.default_span = latest - earliest
@@ -1160,6 +1161,7 @@ class MoveContext(EditingContext):
                 position + self.default_span)
 
         priority = max(self.min_priority, priority)
+        position = max(self.min_position, position)
 
         self.focus.priority = priority
         self.focus.setStart(position, snap = self._snap)