Server error when trying to query maps from a user that does not exist

[pchote]

e.g. https://resource.openra.net/maps/uploader/0/

ERROR:django.request:Internal Server Error: /maps/uploader/0/
Traceback (most recent call last):
  File "/home/resource/Envs/resource.openra.net/lib/python3.4/site-packages/django/core/handlers/base.py", line 149, in get_response
    response = self.process_exception_by_middleware(e, request)
  File "/home/resource/Envs/resource.openra.net/lib/python3.4/site-packages/django/core/handlers/base.py", line 147, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/resource/sites/resource.openra.net/www/openra/views.py", line 299, in maps_uploader
    'title': ' - Maps uploaded by ' + mapObject[0].user.username,
IndexError: list index out of range