Fix a big where we could not add interfaces when running in a 64-bit kernel.
Fix a big where we could not add interfaces when running in a 64-bit kernel.

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