ESP32 WLAN not modify information

Reference #305 

I checked that

from network import WLAN
wlan = WLAN ()
wlan.status ()
wlan.isconnected ()
wlan.isconfig ()

result:

1010
True
('10 .1.2.141 ',' 255.255.255.0 ', '10 .1.2.1', '10 .1.2.1 ')

turn off my router

result:

1010
True
('0.0.0.0', '0.0.0.0', '0.0.0.0', '10 .1.2.1 ')
status() e isconnected() not changed.

thanks