fixup in case the operator disables IPv4.

git-svn-id: file:///svn/unbound/trunk@421 be551aaa-1e26-0410-a405-d3ace91eadb9

doc/Changelog

@@ -7,6 +7,7 @@
 	- changed iterator so that it does not alter module_qstate.qinfo
 	  but keeps a chase query info. Also query_flags are not altered,
 	  the iterator uses chase_flags.
+	- fixup crash in case no ports for the family exist.
 
 21 June 2007: Wouter
 	- Fixup secondary buffer in case of error callback.

services/outside_network.c

@@ -734,6 +734,10 @@ pending_udp_query(struct outside_network* outnet, ldns_buffer* packet,
 		return NULL;
 	}
 	select_port(outnet, pend, rnd);
+	if(!pend->c) {
+		pending_delete(outnet, pend);
+		return NULL;
+	}
 
 	/* send it over the commlink */
 	if(!comm_point_send_udp_msg(pend->c, packet, (struct sockaddr*)addr,