Avoid return nil when dealing with protos
Avoid return nil when dealing with protos

jvanmalder/ttn,jvanmalder/ttn,mgranberry/ttn,TheThingsNetwork/ttn,jvanmalder/ttn,mgranberry/ttn,LoRaWanSoFa/ttn,LoRaWanSoFa/ttn,TheThingsNetwork/ttn,mgranberry/ttn,TheThingsNetwork/ttn