[pitivi] timeline: Minor copy/paste fix

[Thibault Saunier <tsaunier src gnome org>]

commit 20a09b14f23bc6db277f097ddfaaf4c3a6ad0b65
Author: Thibault Saunier <tsaunier gnome org>
Date:   Fri Jul 3 13:27:36 2015 +0200

    timeline: Minor copy/paste fix

 pitivi/timeline/timeline.py |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/pitivi/timeline/timeline.py b/pitivi/timeline/timeline.py
index b1f4abe..9b8a4b1 100644
--- a/pitivi/timeline/timeline.py
+++ b/pitivi/timeline/timeline.py
@@ -1095,6 +1095,7 @@ class TimelineContainer(Gtk.Grid, Zoomable, Loggable):
         self._projectmanager = None
         self._project = None
         self.bTimeline = None
+        self.__copiedGroup = None
 
         self.ui_manager.add_ui_from_file(
             os.path.join(get_ui_dir(), "timelinecontainer.xml"))