Fixed a regression in resync decission code drbd_uuid_compare() [Bugz 260]

Since 8.3.3 we fail to do the resync when a partial resynch is not
possible, but a full synch is necessary.

This regression was introduced with 7101539930c0a89146959e7a39c09ad9c3516434
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

drivers/block/drbd/drbd_receiver.c

@@ -2400,6 +2400,7 @@ static int drbd_uuid_compare(struct drbd_conf *mdev, int *rule_nr) __must_hold(l
 
 
 	*rule_nr = 80;
+	peer = mdev->p_uuid[UI_CURRENT] & ~((u64)1);
 	for (i = UI_HISTORY_START; i <= UI_HISTORY_END; i++) {
 		self = mdev->ldev->md.uuid[i] & ~((u64)1);
 		if (self == peer)