btreplay: fix memory corruption caused by CPU_ZERO_S Size should be provided, not cpus number. Signed-off-by: Roman Pen <r.peniaev@gmail.com> Cc: Jens Axboe <axboe@fb.com> Cc: <linux-btrace@vger.kernel.org> Signed-off-by: Jens Axboe <axboe@fb.com>