Make LADSPA effects work
@jeff
Submitted by Jeff F.T. Assigned to Alex Băluț @aleb
Description
If you install the various ladspa* packages in Fedora and try to use them in pitivi, you will usually get:
File "pitivi/factories/operation.py", line 94, in _makeBin
bin.add_pad(gst.GhostPad("src", fx.get_pad("src")))
TypeError: GstGhostPad.init() argument 2 must be gst.Pad, not None
Imported from https://bugzilla.gnome.org/show_bug.cgi?id=650985