add more tests for Lwt_stream.clone ( and expose a bug )
add more tests for Lwt_stream.clone ( and expose a bug )

Ignore-this: 844e0ea4b6ecf8c4e2a802cc1e755aa4

darcs-hash:20100217183429-0cb73-023c47fd2d0331cc1030f62132118a0a19acbf46.gz

avsm/lwt-OLD,avsm/lwt-OLD