Damien George 9f241ef398 py: Optimise call to mp_arg_check_num by compressing fun signature. ...

With 5 arguments to mp_arg_check_num(), some architectures need to pass
values on the stack.  So compressing n_args_min, n_args_max, takes_kw into
a single word and passing only 3 arguments makes the call more efficient,
because almost all calls to this function pass in constant values.  Code
size is also reduced by a decent amount:

   bare-arm:  -116
minimal x86:   -64
   unix x64:  -256
unix nanbox:  -112
      stm32:  -324
     cc3200:  -192
    esp8266:  -192
      esp32:  -144

2018-09-14 13:39:17 +10:00

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