FreeIMI GUI and FreeIMU_Serial - Accelerometer and Magnetometer bad data

Hello,
it seems to me that there is an error with Arduino serial sketch for calibration (for Teensy 3.2).
The datas read by cal_gui.py are not correct until I replace (around line 186, for `else if(cmd=='b')`) :

`writeArr(raw_values, 9, sizeof(int))` by `writeArr(raw_values, 9, sizeof(int16_t));`

Best regards