CID 373821 & CID 373822: Control flow issues in lib/dns/zone.c

Coverity Scan claims dead code in lib/dns/zone.c on main.

*** CID 373822:  Control flow issues  (DEADCODE)
/lib/dns/zone.c: 12258 in zone_dump()
12252     	DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_DUMPING);
12253     	if (result != ISC_R_SUCCESS) {
12254     		/*
12255     		 * Try again in a short while.
12256     		 */
12257     		zone_needdump(zone, DNS_DUMP_DELAY);
>>>     CID 373822:  Control flow issues  (DEADCODE)
>>>     Execution cannot reach this statement: "if ((({
  __auto_type __ato...".
12258     	} else if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FLUSH) &&
12259     		   DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) &&
12260     		   DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED))
12261     	{
12262     		DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDDUMP);
12263     		DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_DUMPING);

*** CID 373821:  Control flow issues  (DEADCODE)
/lib/dns/zone.c: 12271 in zone_dump()
12265     		again = true;
12266     	} else {
12267     		DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_FLUSH);
12268     	}
12269     	UNLOCK_ZONE(zone);
12270     	if (again) {
>>>     CID 373821:  Control flow issues  (DEADCODE)
>>>     Execution cannot reach this statement: "goto redo;".
12271     		goto redo;
12272     	}
12273     
12274     	return (result);
12275     }
12276