ocfs2: warn the user on a dead timeout mismatch

Print a warning to the user when a node with a different dead count joins
the region.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

fs/ocfs2/cluster/ocfs2_heartbeat.h

@@ -32,6 +32,7 @@ struct o2hb_disk_heartbeat_block {
 	__u8  hb_pad1[3];
 	__le32 hb_cksum;
 	__le64 hb_generation;
+	__le32 hb_dead_ms;
 };
 
 #endif /* _OCFS2_HEARTBEAT_H */