fixes to really make it works with ocaml 3.11
fixes to really make it works with ocaml 3.11

Ignore-this: 5469b21737f2589a82bd6e4ab991153

darcs-hash:20100825112633-c41ad-c9fab33910d2bb5f4d96ee7807e8c88f26b44739.gz

avsm/lwt-OLD,avsm/lwt-OLD