fs: dlm: fix check for multi-homed hosts

This patch will use the runtime array size dlm_local_count variable
to check the actual size of the dlm_local_addr array. There exists
currently a cleanup bug, because the tcp_listen_for_all() functionality
might check on a dangled pointer.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>

fs/dlm/lowcomms.c

@@ -1288,7 +1288,7 @@ out:
 static int tcp_listen_for_all(void)
 {
 	/* We don't support multi-homed hosts */
-	if (dlm_local_addr[1] != NULL) {
+	if (dlm_local_count > 1) {
 		log_print("TCP protocol can't handle multi-homed hosts, "
 			  "try SCTP");
 		return -EINVAL;