[pitivi] ui.viewer: fix typo (which disabled seek-by-mousewheel)

[Edward Hervey <edwardrv src gnome org>]

commit bba30120561b1e62cdb26a587e325daf7840ed3c
Author: Edward Hervey <bilboed bilboed com>
Date:   Sun May 10 11:13:15 2009 +0200

    ui.viewer: fix typo (which disabled seek-by-mousewheel)
---
 pitivi/ui/viewer.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/pitivi/ui/viewer.py b/pitivi/ui/viewer.py
index c3dfdc2..3f5fe8f 100644
--- a/pitivi/ui/viewer.py
+++ b/pitivi/ui/viewer.py
@@ -333,7 +333,7 @@ class PitiviViewer(gtk.VBox, Loggable):
             amount = -gst.SECOND
         else:
             amount = gst.SECOND
-        self.seekRelative(self, amount)
+        self.seekRelative(amount)
 
     def seek(self, position, format=gst.FORMAT_TIME):
         self.seeker.seek(position, format)