Ensure that buffer contents are random across jobs as well

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/verify.c b/verify.c
index fc207cf..c450e88 100644
--- a/verify.c
+++ b/verify.c
@@ -36,7 +36,7 @@
 		if (use_seed)
 			__fill_random_buf(p, len, seed);
 		else
-			io_u->rand_seed = fill_random_buf(p, len);
+			io_u->rand_seed = fill_random_buf(&td->buf_state, p, len);
 		break;
 	case 1:
 		/*