Address some signed/unsigned warnings reported by Thomas Zimmermann in https://bugzilla.mozilla.org/show_bug.cgi?id=970271
Address some signed/unsigned warnings reported by
Thomas Zimmermann in
https://bugzilla.mozilla.org/show_bug.cgi?id=970271

TopPano/sctp-refimpl,gale320/sctp-refimpl,tosakanth/sctp-refimpl,timsuchanek/sctp-refimpl,sdd330/sctp-refimpl,gale320/sctp-refimpl,tosakanth/sctp-refimpl,sdd330/sctp-refimpl,sdd330/sctp-refimpl,timsuchanek/sctp-refimpl,tosakanth/sctp-refimpl,tosakanth/sctp-refimpl,TopPano/sctp-refimpl,gale320/sctp-refimpl,tosakanth/sctp-refimpl,timsuchanek/sctp-refimpl,timsuchanek/sctp-refimpl,tosakanth/sctp-refimpl,gale320/sctp-refimpl,sdd330/sctp-refimpl,gale320/sctp-refimpl,timsuchanek/sctp-refimpl,TopPano/sctp-refimpl,timsuchanek/sctp-refimpl,sdd330/sctp-refimpl,sdd330/sctp-refimpl,TopPano/sctp-refimpl,TopPano/sctp-refimpl,TopPano/sctp-refimpl,sdd330/sctp-refimpl,TopPano/sctp-refimpl,sdd330/sctp-refimpl,sdd330/sctp-refimpl,TopPano/sctp-refimpl,gale320/sctp-refimpl,tosakanth/sctp-refimpl,gale320/sctp-refimpl,timsuchanek/sctp-refimpl,timsuchanek/sctp-refimpl,gale320/sctp-refimpl,tosakanth/sctp-refimpl,gale320/sctp-refimpl,tosakanth/sctp-refimpl,timsuchanek/sctp-refimpl,TopPano/sctp-refimpl