pgsql: Fix pg_ctl -D handling for Win32:

Log Message:
-----------
Fix pg_ctl -D handling for Win32:

C:\msys\1.0\home\y-asaba>pg_ctl -D data restart
waiting for postmaster to shut down...LOG: received smart shutdown
request.
LOG: shutting down
LOG: database system is shut down
done
postmaster stopped

postmaster starting

C:\msys\1.0\home\y-asaba>postmaster.exe: invalid argument: "'-D'"
Try "postmaster.exe --help" for more information.

Yoshiyuki Asaba

Modified Files:
--------------
pgsql/src/backend/postmaster:
postmaster.c (r1.433 -> r1.434)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/postmaster/postmaster.c.diff?r1=1.433&r2=1.434)
pgsql/src/bin/pg_ctl:
pg_ctl.c (r1.37 -> r1.38)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_ctl/pg_ctl.c.diff?r1=1.37&r2=1.38)