[exim] [BUG?] in src/auths/pwcheck.c

Dear Philip and all,

while reusing the code in src/auths/pwcheck.c I noticed a potential
problem in saslauthd_verify_password
where towards the end you have:

     *reply = daemon_reply;

that should be, like all other assignements:

     if (reply)
        *reply = daemon_reply;

I was hit by this while calling the function with a NULL reply.

I hope Philip you will not mind if I liberally take from that source
to develop an apache mod_authnz_sasl module (for apache2). Almost done..

Thanks

Giuliano