Comment 0 for bug 1533280

Trunk revision n. 2605 / Win 64 bit python

If song has linked audio, it triggers the following traceback instead of going live:

Traceback (most recent call last):
  File "E:\bzr\openlp\trunk\openlp\core\lib\mediamanageritem.py", line 459, in on_double_clicked
    self.on_live_click()
  File "E:\bzr\openlp\trunk\openlp\core\lib\mediamanageritem.py", line 500, in on_live_click
    self.go_live()
  File "E:\bzr\openlp\trunk\openlp\core\lib\mediamanageritem.py", line 527, in go_live
    self.live_controller.add_service_item(service_item)
  File "E:\bzr\openlp\trunk\openlp\core\ui\slidecontroller.py", line 779, in add_service_item
    self._process_item(item, slide_no)
  File "E:\bzr\openlp\trunk\openlp\core\ui\slidecontroller.py", line 849, in _process_item
    self.display.audio_player.add_to_playlist(self.service_item.background_audio)
  File "E:\bzr\openlp\trunk\openlp\core\ui\maindisplay.py", line 646, in add_to_playlist
    self.playlist.addMedia(QtCore.QUrl(file_name))
TypeError: arguments did not match any overloaded call:
  QMediaPlaylist.addMedia(QMediaContent): argument 1 has unexpected type 'QUrl'
  QMediaPlaylist.addMedia(list-of-QMediaContent): argument 1 has unexpected type 'QUrl'