When retrieving a requeued IO, don't setup data pointers again

This is a bug, if we had a residual data count we would be
retrying the full request again.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/io_u.c b/io_u.c
index 7ac31a0..faa1c5e 100644
--- a/io_u.c
+++ b/io_u.c
@@ -764,10 +764,9 @@
 	 * Set io data pointers.
 	 */
 	io_u->endpos = io_u->offset + io_u->buflen;
-out:
 	io_u->xfer_buf = io_u->buf;
 	io_u->xfer_buflen = io_u->buflen;
-
+out:
 	if (!td_io_prep(td, io_u)) {
 		fio_gettime(&io_u->start_time, NULL);
 		return io_u;