[Python-Dev] fdopen mode needs sanitizing

In fileobject the mode string is sanitized using a function, sanitize_the_mode(). The same thing needs to happen for posixmodule.fdopen(). Otherwise, the universal_newlines regression test in test_subprocess.py will fail for python compiled with Visual Studio 2005. I have made a local patch by copying this static function over, and it fixes the issue, but I wonder if we would want to share this code? Also, are there other places that spring to mind where we have to sanitize mode strings before handing them to fopen-like functions? Kristján