Fix the detection of multicast addresses when scanning the IPv4 addresses of an INIT or INIT-ACK.
Fix the detection of multicast addresses when scanning the IPv4 addresses
of an INIT or INIT-ACK.

sdd330/sctp-refimpl,xwhuang/sctp-refimpl,sctplab/sctp-refimpl,timsuchanek/sctp-refimpl,timsuchanek/sctp-refimpl,xwhuang/sctp-refimpl,deepak899/sctp-refimpl,deepak899/sctp-refimpl,gale320/sctp-refimpl,sdd330/sctp-refimpl,gale320/sctp-refimpl,xwhuang/sctp-refimpl,TopPano/sctp-refimpl,timsuchanek/sctp-refimpl,xwhuang/sctp-refimpl,timsuchanek/sctp-refimpl,TopPano/sctp-refimpl,timsuchanek/sctp-refimpl,deepak899/sctp-refimpl,gale320/sctp-refimpl,TopPano/sctp-refimpl,tosakanth/sctp-refimpl,sdd330/sctp-refimpl,TopPano/sctp-refimpl,gale320/sctp-refimpl,TopPano/sctp-refimpl,timsuchanek/sctp-refimpl,tosakanth/sctp-refimpl,TopPano/sctp-refimpl,TopPano/sctp-refimpl,sctplab/sctp-refimpl,timsuchanek/sctp-refimpl,sdd330/sctp-refimpl,sdd330/sctp-refimpl,tosakanth/sctp-refimpl,gale320/sctp-refimpl,gale320/sctp-refimpl,timsuchanek/sctp-refimpl,deepak899/sctp-refimpl,deepak899/sctp-refimpl,tosakanth/sctp-refimpl,gale320/sctp-refimpl,tosakanth/sctp-refimpl,gale320/sctp-refimpl,tosakanth/sctp-refimpl,sctplab/sctp-refimpl,xwhuang/sctp-refimpl,tosakanth/sctp-refimpl,sctplab/sctp-refimpl,sctplab/sctp-refimpl,sctplab/sctp-refimpl,tosakanth/sctp-refimpl,timsuchanek/sctp-refimpl,TopPano/sctp-refimpl,TopPano/sctp-refimpl,gale320/sctp-refimpl,deepak899/sctp-refimpl,sdd330/sctp-refimpl,xwhuang/sctp-refimpl,sdd330/sctp-refimpl,tosakanth/sctp-refimpl,sdd330/sctp-refimpl,sdd330/sctp-refimpl