Log Message:
-----------
Use _dosmaperr() to deal with errors opening files in pgwin32_open().
Per complaint from Alvaro and subsequent discussion.
Modified Files:
--------------
pgsql/src/port:
open.c (r1.21 -> r1.22)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/port/open.c?r1=1.21&r2=1.22)