cfg.h: mark "address_length" as an unused member

* include/corosync/cfg.h: Add a FIXME comment.

git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@1998 fd59a12c-fef9-0310-b244-a6a79926bd2f

include/corosync/cfg.h

@@ -133,7 +133,7 @@ typedef struct {
  */
 typedef struct
 {
-	int  address_length;
+	int address_length; /* FIXME: set but never used */
 	char address[sizeof(struct sockaddr_in6)];
 } corosync_cfg_node_address_t;