pgsql: Add small hack to support use of Unicode-based locales on WIN32.

Log Message:
-----------
Add small hack to support use of Unicode-based locales on WIN32.  This
is not adequately tested yet, but let's get it into beta1 so it can be
tested.  Magnus Hagander and Tom Lane.

Modified Files:
--------------
    pgsql/src/backend/utils/adt:
        oracle_compat.c (r1.60 -> r1.61)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/oracle_compat.c.diff?r1=1.60&r2=1.61)
        varlena.c (r1.131 -> r1.132)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/varlena.c.diff?r1=1.131&r2=1.132)