Skip invalid interfaces during 'listen on *'; ok henning@

src/usr.sbin/ntpd/server.c

@@ -1,4 +1,4 @@
-/*	$OpenBSD: server.c,v 1.23 2005/07/05 10:09:12 dtucker Exp $ */
+/*	$OpenBSD: server.c,v 1.24 2005/07/22 08:58:56 dtucker Exp $ */
 
 /*
  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
@@ -44,6 +44,8 @@ setup_listeners(struct servent *se, struct ntpd_conf *conf, u_int *cnt)
 		for (ifap = ifa; ifap != NULL; ifap = ifap->ifa_next) {
 			sa = ifap->ifa_addr;
 
+			if (SA_LEN(sa) == 0)
+				continue;
 			if (sa == NULL ||
 			    (sa->sa_family != AF_INET &&
 			    sa->sa_family != AF_INET6))