Ruby

• win32/win32.c (rb_w32_open, rb_w32_wopen): check if the file is a
  directory when access denied, to set errno to EISDIR.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35129 b2dd03c8-39d4-4d8f-98ff-823fe69b080e