Exception in log on production server

[o1da]

Bugfix is needed.

Traceback (most recent call last):
  File "/usr/local/bin/bottle.py", line 764, in _handle
    return route.call(**args)
  File "/usr/local/bin/bottle.py", line 1575, in wrapper
    rv = callback(*a, **ka)
  File "/var/www/epsg.io/app.py", line 1213, in index
    url_coords = rcode
UnboundLocalError: local variable 'rcode' referenced before assignment