Ruby

win32.c: call w32_wopen directly

• win32/win32.c (rb_w32_uopen): call w32_wopen directly instead of
  variadic rb_w32_wopen.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54511 b2dd03c8-39d4-4d8f-98ff-823fe69b080e