fix RA processing.  bug in ericsson mobile-ip6 patch.  reported by kato@wide
fix RA processing.  bug in ericsson mobile-ip6 patch.  reported by kato@wide

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