make sure we actually have parts

diff --git a/pdns/dnsrecords.cc b/pdns/dnsrecords.cc
index 1c3c1f79fdba9cc67258cc4b2c8f2c8d79bc4889..3b3d569c15e7e13d6e8100708f02c5b5e305258a 100644 (file)
--- a/pdns/dnsrecords.cc
+++ b/pdns/dnsrecords.cc
@@ -52,6 +52,8 @@ string DNSResourceRecord::getZoneRepresentation(bool noDot) const {
     case QType::SRV:
     case QType::MX:
       stringtok(parts, content);
+      if (!parts.size())
+        return "";
       last = *parts.rbegin();
       ret << content;
       if (last == ".")