Fixed warning about wrong number of arguments gettin passed to run()

Fixed warning about wrong number of arguments gettin passed to run() in file WaveGenerator/Utilities/MapDecomposingThread.py

    Process Process-1:
    Traceback (most recent call last):
      File "/usr/lib/python2.7/multiprocessing/process.py", line 258, in _bootstrap
        self.run()
      File "/usr/lib/python2.7/multiprocessing/process.py", line 114, in run
        self._target(*self._args, **self._kwargs)
    TypeError: run() takes exactly 1 argument (2 given)