LDNS_RR_CLASS_LAST
if (a > LDNS_RR_CLASS_LAST) {
LDNS_RR_CLASS_COUNT = LDNS_RR_CLASS_LAST - LDNS_RR_CLASS_FIRST + 1
if (a > LDNS_RR_CLASS_LAST) {
LDNS_RR_CLASS_COUNT = LDNS_RR_CLASS_LAST - LDNS_RR_CLASS_FIRST + 1