client dies with EBADF

[mutability]

Something's probably closing a descriptor but it's not getting unregistered from asyncore

Fri Aug 21 18:21:23 2015 Handshake complete.
Fri Aug 21 18:21:23 2015   Compression:       zlib2
Fri Aug 21 18:21:23 2015   UDP transport:     mlat.mutability.co.uk:40147
Fri Aug 21 18:21:23 2015   Split sync:        disabled
Fri Aug 21 18:21:24 2015 Disconnecting from mlat.mutability.co.uk:40147: Client shutting down
Traceback (most recent call last):
  File "/usr/bin/mlat-client", line 99, in <module>
    main()
  File "/usr/bin/mlat-client", line 96, in main
    coordinator.run_forever()
  File "/usr/lib/python3/dist-packages/mlat/client/coordinator.py", line 81, in run_forever
    self.run_until(lambda: False)
  File "/usr/lib/python3/dist-packages/mlat/client/coordinator.py", line 90, in run_until
    asyncore.loop(timeout=0.1, count=5)
  File "/usr/lib/python3.2/asyncore.py", line 220, in loop
    poll_fun(timeout, map)
  File "/usr/lib/python3.2/asyncore.py", line 145, in poll
    r, w, e = select.select(r, w, e, timeout)
select.error: (9, 'Bad file descriptor')