Re-seed random generator when a file is reset

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/io_u.c b/io_u.c
index 3de04ef..1658fb2 100644
--- a/io_u.c
+++ b/io_u.c
@@ -223,7 +223,7 @@
 		return 0;
 
 	if (td->o.time_based) {
-		fio_file_reset(f);
+		fio_file_reset(td, f);
 		if (!get_next_rand_offset(td, f, ddir, b))
 			return 0;
 	}