WiFiUpd: fix warning
WiFiUpd: fix warning

hallard/Arduino,wemos/Arduino,hallard/Arduino,lrmoreno007/Arduino,jes/Arduino,Lan-Hekary/Arduino,Juppit/Arduino,sticilface/Arduino,sticilface/Arduino,lrmoreno007/Arduino,Adam5Wu/Arduino,hallard/Arduino,wemos/Arduino,lrmoreno007/Arduino,Adam5Wu/Arduino,hallard/Arduino,sticilface/Arduino,Adam5Wu/Arduino,me-no-dev/Arduino,hallard/Arduino,Lan-Hekary/Arduino,jes/Arduino,sticilface/Arduino,Juppit/Arduino,me-no-dev/Arduino,Adam5Wu/Arduino,jes/Arduino,jes/Arduino,me-no-dev/Arduino,esp8266/Arduino,wemos/Arduino,Juppit/Arduino,Adam5Wu/Arduino,Juppit/Arduino,esp8266/Arduino,Lan-Hekary/Arduino,Juppit/Arduino,sticilface/Arduino,lrmoreno007/Arduino,esp8266/Arduino,esp8266/Arduino,esp8266/Arduino,Lan-Hekary/Arduino,lrmoreno007/Arduino,me-no-dev/Arduino,wemos/Arduino,wemos/Arduino,jes/Arduino,me-no-dev/Arduino,Lan-Hekary/Arduino