No Proper Indentation and extra parenthese fixed

Running this script gave 3 errors initially,

root@raspberrypi:/home/pi# python3 adcpi-readrepeat.py
  File "adcpi-readrepeat.py", line 39
    return 0.00
              ^
IndentationError: unindent does not match any outer indentation level



File "adcpi-readrepeat.py", line 57
    ChangeChannel(adc_address1, adc_channel2))
                                             ^
SyntaxError: invalid syntax


 File "adcpi-readrepeat.py", line 44
    ChangeChannel(adc_address1, adc_channel1))
                                             ^
SyntaxError: invalid syntax
Merge pull request #2 from Sufyan/patch-1

No Proper Indentation and extra parenthese fixed