[pitivi] mediafilespreviewer: Reuse togglePlayback

[Thibault Saunier <tsaunier src gnome org>]

commit 396bbdf73b20db34f2d2d2d346fd6a339a46ee28
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Thu Nov 19 09:45:08 2015 +0100

    mediafilespreviewer: Reuse togglePlayback

 pitivi/mediafilespreviewer.py |    5 +----
 1 files changed, 1 insertions(+), 4 deletions(-)
---
diff --git a/pitivi/mediafilespreviewer.py b/pitivi/mediafilespreviewer.py
index 3e83125..ae1ec2b 100644
--- a/pitivi/mediafilespreviewer.py
+++ b/pitivi/mediafilespreviewer.py
@@ -368,10 +368,7 @@ class PreviewWidget(Gtk.Grid, Loggable):
         return self.is_playing
 
     def _on_start_stop_clicked_cb(self, button):
-        if self.is_playing:
-            self.pause()
-        else:
-            self.play()
+        self.togglePlayback()
 
     def _on_zoom_clicked_cb(self, button, increment):
         if self.current_preview_type == 'video':