[gnome-music] clear playlist model before deleting the playlist.

[Vadim Rutkovsky <vrutkovsky src gnome org>]

commit cc31997a5fc5698c912f16b1d827319fb863cf49
Author: Sai Suman Prayaga <suman sai14 gmail com>
Date:   Fri Apr 4 14:24:35 2014 +0530

    clear playlist model before deleting the playlist.

 gnomemusic/view.py |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gnomemusic/view.py b/gnomemusic/view.py
index 6b3ab87..1296ba5 100644
--- a/gnomemusic/view.py
+++ b/gnomemusic/view.py
@@ -999,6 +999,7 @@ class Playlist(ViewContainer):
                        self._model.get_path(_iter))
 
     def _on_delete_activate(self, menuitem, data=None):
+        self._model.clear()
         _iter = self.playlists_sidebar.get_generic_view().get_selection().get_selected()[1]
         if not _iter:
             return