[pitivi] previewer.py: don't draw anything if we get an empty buffer

[Edward Hervey <edwardrv src gnome org>]

commit 22bbe2177fdf46c98674771e01742c7ff9699c3b
Author: Brandon Lewis <brandon_lewis berkeley edu>
Date:   Thu Sep 24 21:05:49 2009 -0700

    previewer.py: don't draw anything if we get an empty buffer

 pitivi/ui/previewer.py |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)
---
diff --git a/pitivi/ui/previewer.py b/pitivi/ui/previewer.py
index ef5e39d..a67b49f 100644
--- a/pitivi/ui/previewer.py
+++ b/pitivi/ui/previewer.py
@@ -477,9 +477,6 @@ class RandomAccessAudioPreviewer(RandomAccessPreviewer):
         samples = self.audioSink.samples
 
         if not samples:
-            cr.move_to(0, hscale)
-            cr.line_to(self.twidth, hscale)
-            cr.stroke()
             return
 
         # find the samples-per-pixel ratio