[Clock] Theme rendering bug in Natty

PythonArgs: ['/usr/share/screenlets/screenlets-pack-all/Clock/ClockScreenlet.py']
Traceback:
 Traceback (most recent call last):
   File "/usr/lib/pymodules/python2.7/screenlets/__init__.py", line 2074, in realize_event
     self.on_realize()
   File "/usr/share/screenlets/screenlets-pack-all/Clock/ClockScreenlet.py", line 221, in on_realize
     self.refresh_buffers()
   File "/usr/share/screenlets/screenlets-pack-all/Clock/ClockScreenlet.py", line 256, in refresh_buffers
     self.redraw_foreground()
   File "/usr/share/screenlets/screenlets-pack-all/Clock/ClockScreenlet.py", line 269, in redraw_foreground
     self.theme.render(ctx_fore,'clock-face-shadow')
 AttributeError: 'NoneType' object has no attribute 'render'

Is it a bug because theme is not loaded yet, but screenlet already tries to use it? Could just check if theme is None before execution.