fixed to check the length of the pf_route message. reported by http://www.NetBSD.org/cgi-bin/query-pr-single.pl?number=15693
fixed to check the length of the pf_route message.
reported by http://www.NetBSD.org/cgi-bin/query-pr-single.pl?number=15693

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame