   datareader_properties._buffer = DDS_Security_PropertySeq_allocbuf(0);   datareader_properties._length = datareader_properties._maximum = 0;   datareader_properties._buffer[0].name = ddsrt_strdup("dds.sec.builtin_endpoint_name");   datareader_properties._buffer[0].value = ddsrt_strdup("Builtin