[krbdev.mit.edu #7454] select on set of all bad fds

[Greg Hudson via RT]

Do you really mean select()?  I would expect krb5 1.10.x on Debian to use 
poll().  That's not really important, though.

If there are no valid fds in the connection state list, then selstate-
>nfds should be 0 and the loop should terminate.  I can't find any bugs 
which would violate that invariant.  If you see this happening again, can 
you examine the contents of the selstate structure?