[PATCH][libstdc++-v3 parallel mode] Get rid of hard-coded ints [was: Re: ints in parallel code]

[Paolo Carlini]

Paolo Carlini wrote:
> Could you please double check for me that the use of _SeqNumber instead
> of int, etc, didn't produce overlong lines? Please, don't let me go
> through again boring formatting issues ;)
>   
I spotted only one in balanced_quicksort.h, fixed it and committed.

Thanks again,
Paolo.