(V2.1) Wrist Servo Problem

[apockill]

Bug:
When plugging in robot, wrist goes all the way to 0 degrees, and makes "whining" noises.

Expected Result:
Wrist servo should stay in it's current position

Steps to reproduce bug:

1. Unplug robot from power and computer.
2. Make sure robot has a wrist servo.
3. Plug in robot power supply.

[yuntian1019]

Fixed in version 2.1.2
The wrist servo uses different pulse width(600~2400), and some machine didn't store assembly offset when produced. So when power up, it will read a wrong parameter from EEPROM.
2.1.2 set the offset to 0 in this condition.