Virtaal and Python warnings

[Reinout van Schouwen <reinouts gnome org>]

cc: gnome-i18n

Dear Python hackers,

We're doing a small translation sprint here at GUADEC and found out 
that we couldn't use Virtaal any more, at least on the latest Sabayon 
and Fedora releases. It used to work fine. Warnings are printed to the 
console at startup and the editing boxes remain gray when you click on 
them.

$ virtaal
/usr/lib64/python2.7/site-packages/gobject/__init__.py:115: Warning: 
attempting to add an interface (GtkCellEditable) to class (UnitView) 
after class_init
  type_register(cls, namespace.get('__gtype_name__'))
/usr/lib64/python2.7/site-packages/gobject/__init__.py:115: Warning: 
attempting to add an interface (GtkCellEditable) to class (CellWidget) 
after class_init
  type_register(cls, namespace.get('__gtype_name__'))
Traceback (most recent call last):
  File 
"/usr/lib/python2.7/site-packages/virtaal/views/widgets/storecellrenderer.py", 
line 192, in do_start_editing
    self._editor_editing_done_id = editor.connect("editing-done", 
self._on_editor_done)
TypeError: <UnitView object at 0x18f4fa0 (UnitView at 0x16ae570)>: 
unknown signal name: editing-done

Corresponding bug reports are:
http://bugs.locamotion.org/show_bug.cgi?id=2713
https://bugzilla.redhat.com/show_bug.cgi?id=988049

After some research we found that the problem could be related to
https://bugzilla.gnome.org/show_bug.cgi?id=686149 and this commit:
https://git.gnome.org/browse/pygobject/commit/?h=pygobject-3-8&id=efcb0f9fda65e24ae98438d61487d06db9eac1b1

Could you shed some light into the darkness for us? We've tried to 
debug the problem but the error is a bit to deep for our feeble 
translator minds. ;)

--
Reinout van Schouwen