[pitivi] timeline: Cleanup dropping data on leave if we could not create an element from them

[Thibault Saunier <tsaunier src gnome org>]

commit 42822488387bb98554e0f011909303ecca1b808a
Author: Thibault Saunier <tsaunier gnome org>
Date:   Wed Sep 16 19:25:45 2015 +0200

    timeline: Cleanup dropping data on leave if we could not create an element from them
    
    Otherwise it break future drag and drops
    
    Fixes T3333

 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 0da75a1..e67df1f 100644
--- a/pitivi/timeline/timeline.py
+++ b/pitivi/timeline/timeline.py
@@ -761,6 +761,8 @@ class Timeline(Gtk.EventBox, Zoomable, Loggable):
             self.draggingElement = None
             self.__got_dragged = False
             self._createdClips = False
+        else:
+            self.cleanDropData()
 
     def cleanDropData(self):
         self.dropDataReady = False