allow 0 as valid value
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@ -15,7 +15,7 @@
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exports.DNS_PACKER_TYPE_SOA = function (ab, dv, total, record) {
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function notNumber(n) {
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return 'number' === typeof n && !isNaN(n);
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return 'number' !== typeof n || isNaN(n);
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}
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if (!record.primary && !record.name_server) {
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