[paho-dev] MQTT-SN DISCONNECT message's Duration is optional.

[Tomoaki Yamaguchi <tomoaki@xxxxxxxxxxxxx>]

Hi All,

in MQTTSNPacket.c

 int MQTTSNSerialize_disconnect(unsigned char* buf, int buflen, int duration)

    ptr += MQTTSNPacket_encode(ptr, len); /* write length */
    writeChar(&ptr, MQTTSN_DISCONNECT);      /* write message type */

    if (duration >= 0)                <======
        writeInt(&ptr, duration);



if (duration >= 0)   should be   if (duration > 0) .

 what is the meaning of optional ?

Tomoaki