MultiSpeed I2C Scanner - 50,100,200,400 KHz.

Oh....
I'm sorry. This morning I found the addition 1 is meaningless and not working as multi speeds. It only scans at 100kHz.
So if you only need to scan at 100kHz, simply comment out the TWBR code and use the nightly ide 1.5.7.

(cf. MPU_DMP6 with Arduino DUE (TWBR not declared) - MPU-6050 6-axis accelerometer/gyroscope (InvenSense) - I2Cdevlib Forums)