pgsql: Avoid using unnecessary pgwin32_safestat in libpq.

Log Message:
-----------
Avoid using unnecessary pgwin32_safestat in libpq.

Tags:
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REL8_3_STABLE

Modified Files:
--------------
pgsql/src/include:
port.h (r1.116.2.3 -> r1.116.2.4)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/port.h?r1=1.116.2.3&r2=1.116.2.4)
pgsql/src/interfaces/libpq:
Makefile (r1.159.2.1 -> r1.159.2.2)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/Makefile?r1=1.159.2.1&r2=1.159.2.2)
pgsql/src/tools/msvc:
Mkvcbuild.pm (r1.25.2.1 -> r1.25.2.2)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/tools/msvc/Mkvcbuild.pm?r1=1.25.2.1&r2=1.25.2.2)