pgsql: Fix to_char() locale handling to honor LC_TIME, not LC_MESSAGES.

Log Message:
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Fix to_char() locale handling to honor LC_TIME, not LC_MESSAGES.

Euler Taveira de Oliveira

Modified Files:
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pgsql/src/backend/utils/adt:
formatting.c (r1.113 -> r1.114)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/formatting.c.diff?r1=1.113&r2=1.114)
pg_locale.c (r1.37 -> r1.38)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/pg_locale.c.diff?r1=1.37&r2=1.38)