TypeError when playing Webradio

[ahocevar]

When I try to play a Webradio entry, I get the following error:

INFO     listen.ListenPlayer   player try to load mms://stream0.orf.at/fm4_live
ERROR    listen.PlayerBin   Failed to create pipeline for mms://stream0.orf.at/fm4_live
Traceback (most recent call last):
  File "/usr/lib/listen/player/fadebin.py", line 388, in xfade_open
    stream = StreamBin(self,uri)
  File "/usr/lib/listen/player/fadebin.py", line 1216, in __init__
    self.__audioresample, self.__capsfilter, self.__preroll, self.__volume)
TypeError: argument must be a GstElement

This prevents Listen from playing Webradio. The error occurs in the current trunk version (r948), but I think it was already there in 0.5.

[theli]

(In [965]) fixes stream detect bug when stream are mms://, fixes #809