Fixed bug in ch.py

Traceback (most recent call last):
  File "bot.py", line 61, in <module>
    TestBot.easy_start()
  File "D:\Python30\ch.py", line 1679, in easy_start
    self.main()
  File "D:\Python30\ch.py", line 1648, in main
    con._feed(data)
  File "D:\Python30\ch.py", line 603, in _feed
    self._process(food.decode().rstrip("\r\n")) #numnumz ;3
  File "D:\Python30\ch.py", line 618, in _process
    getattr(self, func)(args)
  File "D:\Python30\ch.py", line 709, in rcmd_u
    msg = self._mqueue[args[0]]
KeyError: '1'