Power calc for null

[davidmiller]

Traceback (most recent call last):

File "/home/app/randomise_me/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 115, in get_response
response = callback(request, _callback_args, *_callback_kwargs)

File "/home/app/randomise_me/local/lib/python2.7/site-packages/django/views/generic/base.py", line 68, in view
return self.dispatch(request, _args, *_kwargs)

File "/home/app/randomise_me/local/lib/python2.7/site-packages/django/views/generic/base.py", line 86, in dispatch
return handler(request, _args, *_kwargs)

File "/home/app/randomise_me/rm/stats/views.py", line 39, in post
p1, p2 = int(self.request.POST.get('p1', 0)), int(self.request.POST.get('p2', 0))

ValueError: invalid literal for int() with base 10: ''