tree 7e15593be11f8debc68bc3f3f8a69646733dec8a
parent a77d139b089a5f4d0e25c24c61bba9076a32f64b
author Song Liu <songliubraving@fb.com> 1447108332 -0800
committer Jens Axboe <axboe@fb.com> 1447109679 -0700

make sure __rand_0_1 does not return 0.0

Signed-off-by: Jens Axboe <axboe@fb.com>