[gnome-tweak-tool] Dont draw separators above the sidebar

[John Stowers <jstowers src gnome org>]

commit c1e2c3d0a6b41fe709f9318ad603396acfded675
Author: John Stowers <john stowers gmail com>
Date:   Sat Aug 10 20:40:51 2013 +0200

    Dont draw separators above the sidebar

 gtweak/tweakview.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtweak/tweakview.py b/gtweak/tweakview.py
index ff7975c..633601f 100644
--- a/gtweak/tweakview.py
+++ b/gtweak/tweakview.py
@@ -160,7 +160,7 @@ class Window(Gtk.ApplicationWindow):
             return row
     
     def _list_header_func(self, row, before, user_data):
-        if not row.get_header():
+        if before and not row.get_header():
             row.set_header (Gtk.Separator(orientation=Gtk.Orientation.HORIZONTAL))
 
     def _on_key_press(self, widget, event):