Traceback (most recent call last):
  File "/var/lib/python-support/python2.5/Jokosher/EventViewer.py", line 205, in OnDraw
    self.DrawWaveform(event.area)
  File "/var/lib/python-support/python2.5/Jokosher/EventViewer.py", line 391, in DrawWaveform
    context.line_to(x, rect.height)
UnboundLocalError: local variable 'x' referenced before assignment