INN 2.3.1 cant get hostbyaddr bug

[Oleg Gawriloff]

When connecting to inn in log files I see the following string:
? cant gethostbyaddr 172.16.2.33 Undefined error: 0 -- using IP address for
access
accroding to man gethostbyaddr and netdbm.h if gethostbyaddr returns 0 it
means success. Further examination in nnrpd/nnrpd.c gives idea:
if (HostErrorStr == NULL) {
                syslog(L_NOTICE,
                    "? cant gethostbyaddr %s %m -- using IP address for
access",
                    ClientHost);
            } else {
                syslog(L_NOTICE,
                    "? cant gethostbyaddr %s %s -- using IP address for
access",
                    ClientHost, HostErrorStr);
            }
strings 457-465. Else branch here is ambigous.

WBR, Oleg Gawriloff.