compile failure on alpha

[Tom Holroyd]

20020610 snapshot (possibly earlier ones too, I haven't checked in a
while), Alpha, Redhat base, Linux 2.4.19-pre8

configure ; make
 ...
sshconnect.c: In function `sockaddr_ntop':
sshconnect.c:51: structure has no member named `sa_len'

Perhaps it should be SA_LEN(moo) instead of moo->sa_len.