session_zap, rlm_detail segfault

[Alan DeKok]

Stephan Jaeger wrote:
> in session_zap there is no listener set for the generated request and in
> rlm_detail.c in detail_accounting() there is a check for
> request->listener->type == RAD_LISTEN_DETAIL which lets the server
> segfault.

  Whoops.  I don't use that functionality much.

  I've committed a one-line fix.  Let's see if that works.

  Alan DeKok.