snapshot-merge target is activated in place of origin target, so it must
be resumed after all other snapshots --- otherwise small window for data
corruption would exist.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>

---
 lib/libdm-deptree.c |    3 +++
 1 file changed, 3 insertions(+)

Index: device-mapper.1.02.27/lib/libdm-deptree.c
===================================================================
--- device-mapper.1.02.27.orig/lib/libdm-deptree.c	2008-08-04 01:10:03.000000000 +0200
+++ device-mapper.1.02.27/lib/libdm-deptree.c	2008-08-04 01:10:51.000000000 +0200
@@ -1690,6 +1690,9 @@ static int _add_snapshot_target(struct d
 	seg->persistent = persistent ? 1 : 0;
 	seg->chunk_size = chunk_size;
 
+	if (merge)
+		node->activation_priority = 1;
+
 	return 1;
 }