[PATCH][libstdc++-v3 parallel mode] random_shuffle fixes

[Benjamin Kosnik]

> 2008-06-05  Johannes Singler  <singler@ira.uka.de>
> 
>           * include/parallel/random_shuffle.h:
>             (parallel_random_shuffle_drs) Get the actual number of
>             threads after entering the parallel region. Indentation.
>           * include/parallel/algo.h: (random_shuffle(begin, end))
>             Add namespace qualification to avoid ambiguity.

Looks good!

-benjamin