[pitivi] mediafilespreviewer: Add missing parameter to _pipelineErrorCb

[Thibault Saunier <tsaunier src gnome org>]

commit e5176204fd8a3290919b7b5b62760ef3a622bc85
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Thu Nov 19 09:21:20 2015 +0100

    mediafilespreviewer: Add missing parameter to _pipelineErrorCb

 pitivi/mediafilespreviewer.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/pitivi/mediafilespreviewer.py b/pitivi/mediafilespreviewer.py
index f64b044..3e83125 100644
--- a/pitivi/mediafilespreviewer.py
+++ b/pitivi/mediafilespreviewer.py
@@ -357,7 +357,7 @@ class PreviewWidget(Gtk.Grid, Loggable):
         self.play_button.set_stock_id(Gtk.STOCK_MEDIA_PLAY)
         self.pos_adj.set_value(0)
 
-    def _pipelineErrorCb(self, unused_message, unused_detail):
+    def _pipelineErrorCb(self, unused_pipeline, unused_message, unused_detail):
         self.player.setState(Gst.State.NULL)
         self.is_playing = False