"broken"config parameter is broken

[show0k]

Setting all motors as broken in the robot configuration file does not work.
Tested with an Ergo Jr (protocol 2, lightDxlControler).

Traceback:

Exception in thread Thread-4:
Traceback (most recent call last):
  File "/home/poppy/miniconda/lib/python2.7/threading.py", line 810, in __bootstrap_inner
    self.run()
  File "/home/poppy/miniconda/lib/python2.7/threading.py", line 763, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/home/poppy/miniconda/lib/python2.7/site-packages/pypot/utils/stoppablethread.py", line 121, in _wrapped_target
    self._setup()
  File "/home/poppy/miniconda/lib/python2.7/site-packages/pypot/dynamixel/controller.py", line 52, in setup
    self.regname))
IOError: Cannot initialize syncloop for "pid_gain". You need to desactivate sync_read if you use a usb2dynamixel device.