[Tutor] mp3 range violation reportage.

[Tesla Coil]

On 30 May 2001, D-Man replied:
>> But don't know the system doesn't have mpg123 
>> in /usr/local/bin or elsewhere on path.
>> 
>> There's *gotta* be an easy answer to this one.
>
> The easiest way is to just try it.

I did a temporary rename of mpg123 and found that 
clippage.py then just exits rapidly, with nothing
returned to stdout.  Q&D program that this is, I'm
kinda satisfied just to have it not blow sky high.
Conveniently, it's already reading stderr, and it
does the trick here to add:

def whatwentwrong(rawreport):
    # Pass error messages.
    if rawreport[-1][-10:-1]=='not found':
        print rawreport[-1]
    elif rawreport[-1][-26:-14]=='No such file':
        print rawreport[-1]

if __name__ == '__main__':
    commandline = modusoperandi(argv[1])
    mpgout = runtest(commandline)
    whatwentwrong(mpgout)
    relevantdata = slicedown(mpgout)
    tracks = gettracks(relevantdata)
    clips = clipsums(relevantdata)
    reportout(tracks, clips)

Not sure it does the trick elsewhere, but there's
lotsa things I'm not sure about elsewhere.