dm raid1: fix do_failures

Missing braces.  Commit 1f965b1943 (dm raid1: separate region_hash interface
part1) broke it.

Signed-off-by: Ilpo Jarvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Cc: Heinz Mauelshagen <hjm@redhat.com>
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index 92dcc06..9d7b53e 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -656,9 +656,10 @@
 		return;
 
 	if (!ms->log_failure) {
-		while ((bio = bio_list_pop(failures)))
+		while ((bio = bio_list_pop(failures))) {
 			ms->in_sync = 0;
 			dm_rh_mark_nosync(ms->rh, bio, bio->bi_size, 0);
+		}
 		return;
 	}