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check for zone being NULL
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@ -1084,6 +1084,7 @@ ns_xfr_start(ns_client_t *client, dns_rdatatype_t reqtype) {
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keyname, current_serial);
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if (zone != NULL) {
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dns_zone_getraw(zone, &raw);
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mayberaw = (raw != NULL) ? raw : zone;
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if ((client->attributes & NS_CLIENTATTR_WANTEXPIRE) != 0 &&
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@ -1099,6 +1100,7 @@ ns_xfr_start(ns_client_t *client, dns_rdatatype_t reqtype) {
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}
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if (raw != NULL)
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dns_zone_detach(&raw);
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}
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/*
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* Hand the context over to sendstream(). Set xfr to NULL;
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