Thread: pgsql: Omit src/port/pipe.c on non-Windows platforms.

Log Message:
-----------
Omit src/port/pipe.c on non-Windows platforms.  It's useless and draws
complaints about empty object files on some platforms, eg Darwin.

Modified Files:
--------------
    pgsql/src/port:
        Makefile (r1.36 -> r1.37)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/port/Makefile?r1=1.36&r2=1.37)