Fix `wpa_supplicant.conf` bug
Changelog:
- Verify the existence of
wpa_supplicant.conf
before trying to access it.
Built on top of zanzocam 1.3.0.
Hashes for zanzocam_1.3.1.zip:
MD5: aa94857571759fd63faed51b8e187e54
SHA256: 74c5ffd86e218d788afc85719397d9f96e5e4050d5f178a7dd6f663407865627