fix Lwt_unix.connect on Windows
fix Lwt_unix.connect on Windows

Ignore-this: 9367a2031d30b6f75db75932f521ada4

darcs-hash:20110919212912-c41ad-1f2bca36395868c9a9a634a90622ca64d9793d6a

c-cube/lwt,fdopen/lwt,mirage/lwt,ocsigen/lwt,janestreet/lwt-async,gfxmonk/lwt,janestreet/lwt-async,c-cube/lwt,rgrinberg/lwt,rgrinberg/lwt,ocsigen/lwt,mfp/lwt,rgrinberg/lwt,rneswold/lwt,gfxmonk/lwt,rgrinberg/lwt,fdopen/lwt,rneswold/lwt,mfp/lwt,mirage/lwt,ocsigen/lwt,c-cube/lwt,rneswold/lwt