[pitivi] mainwindow: remove generic try / except.

[Mathieu Duponchelle <mathieudu src gnome org>]

commit 4c3d0f92eedb0a4945a9035390c06c9f817d9d95
Author: Mathieu Duponchelle <mduponchelle1 gmail com>
Date:   Wed Jan 29 21:17:25 2014 +0100

    mainwindow: remove generic try / except.

 pitivi/mainwindow.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/pitivi/mainwindow.py b/pitivi/mainwindow.py
index 7895a69..36234d9 100644
--- a/pitivi/mainwindow.py
+++ b/pitivi/mainwindow.py
@@ -1160,7 +1160,7 @@ class PitiviMainWindow(Gtk.Window, Loggable):
             return False
         try:
             self.app.current_project.disconnect_by_func(self._renderingSettingsChangedCb)
-        except:
+        except TypeError:
             # When loading the first project, the signal has never been
             # connected before.
             pass