use a custom PRNG state for Lwt.choose and Lwt.pick
use a custom PRNG state for Lwt.choose and Lwt.pick

Ignore-this: a57f14cac59040765fb5fa6beeb581ca

darcs-hash:20110513182921-c41ad-5beb35db7d23fa082f4de7e9d6c9b4a454b026cd

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