Comment 9 for bug 672164

If I open OpenLP, go to media manager/Presentations and Show Live a presentation, not hooked to a 2nd monitor, I get this error below now.

Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.6/openlp/core/lib/mediamanageritem.py", line 469, in onLiveClick
    self.parent.liveController.addServiceItem(serviceItem)
  File "/usr/lib/pymodules/python2.6/openlp/core/ui/slidecontroller.py", line 524, in addServiceItem
    self._processItem(item, slideno)
  File "/usr/lib/pymodules/python2.6/openlp/core/ui/slidecontroller.py", line 566, in _processItem
    self._forceUnblank()
  File "/usr/lib/pymodules/python2.6/openlp/core/ui/slidecontroller.py", line 1060, in _forceUnblank
    if self.DesktopScreen.isChecked:
AttributeError: 'SlideController' object has no attribute 'DesktopScreen'