isAscii: avoid dependency on _GNU_SOURCE
Fixes https://github.com/arduino/ArduinoCore-API/issues/158 Thanks to @kenny5660 for the one liner
M
Martino Facchin committed
1171abba2c3170c8a93a08f45119594805e13446
Parent: ffc4b00
Fixes https://github.com/arduino/ArduinoCore-API/issues/158 Thanks to @kenny5660 for the one liner