CID 309658: Null pointer dereferences (REVERSE_INULL) in lib/dns/zone.c

Coverity Scan identified null pointer dereference on main and later on v9_16:

*** CID 309658:  Null pointer dereferences  (REVERSE_INULL)

/lib/dns/zone.c: 13461 in create_query()
13455     	if (qname != NULL) {
13456     		dns_message_puttempname(message, &qname);
13457     	}
13458     	if (qrdataset != NULL) {
13459     		dns_message_puttemprdataset(message, &qrdataset);
13460     	}
>>>     CID 309658:  Null pointer dereferences  (REVERSE_INULL)
>>>     Null-checking "message" suggests that it may be null, but it has already been dereferenced on all paths leading to the check.
13461     	if (message != NULL) {
13462     		dns_message_detach(&message);
13463     	}
13464     	return (result);
13465     }
13466   

Adding to %"October 2020 (9.11.24, 9.11.24-S1, 9.16.8, 9.17.6)" milestone as this slipped-in this milestone.