setlocale() and gettext on Windows revisited

Back in January/February, a patch was committed to avoid using libintl's 
version of setlocale:

http://archives.postgresql.org/pgsql-hackers/2011-01/msg02628.php

The comment says it was about a problem with printf() and friends, so I 
wonder, why was that "#undef setlocale" line put inside the larger 
"#ifdef USE_REPL_SNPRINTF" block? If I understand the problem correctly, 
it has nothing to do with our replacement snprintf() function.

Fortunately, we always use the replacement snprintf() code on Windows, 
so there's no user-visible bug here, but if you imagine that we didn't 
USE_REPL_SNPRINTF on Windows, we would still want the "#undef setlocale" 
to take effect, right? I think that block is misplaced.

--   Heikki Linnakangas  EnterpriseDB   http://www.enterprisedb.com