[Patch] Qualify standard functions with std:: in stl_algo.h

[Gabriel Dos Reis]

Paolo Carlini <pcarlini@unitus.it> writes:

| Hi all, hi Gaby,
| 
| this is another bit of the work you envisaged a while ago
| (about 6 months)...
| 
| Very boring but for one thing: ordering becomes important and
| I had to declare 'merge' (both versions) and 'partial sort'
| in advance. Is this ok/expected? I'm not sure that reshuffling
| is even possible and adding a full set of declarations seems
| overkilling...

Hi Paolo,

  Thanks for looking into this.  Is it possible for you to resend the
patch as produced with "diff -u", i.e. in a unified context form?
That makes it easier to review.  Thanks in advance,

-- Gaby