[pitivi] render: Do not try to access non existing project.framerate' attribute

[Alexandru Băluț <alexbalut src gnome org>]

commit afc6a1064340aa25aaf5c2c39a9d29bb2afdf7b5
Author: Thibault Saunier <thibault saunier osg samsung com>
Date:   Fri Jan 6 10:19:28 2017 -0300

    render: Do not try to access non existing project.framerate' attribute
    
    Fixes T7654
    
    Reviewed-by: Alex Băluț <alexandru balut gmail com>
    Differential Revision: https://phabricator.freedesktop.org/D1594

 pitivi/render.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/pitivi/render.py b/pitivi/render.py
index 4810d76..f5da8e2 100644
--- a/pitivi/render.py
+++ b/pitivi/render.py
@@ -749,7 +749,7 @@ class RenderDialog(Loggable):
         self._update_valid_restriction_values(
             caps, self.frame_rate_combo,
             "video/x-raw,framerate=(GstFraction)%d/%d", frame_rates,
-            self.project.framerate,
+            self.project.videorate,
             caps_template_expander=fraction_expander_func)
 
     def updateAvailableEncoders(self):