TemporaryFile is missing the 'tell' method on Windows platforms
|Reported by:||Julien Phalip||Owned by:||Armin Ronacher|
|Cc:||Triage Stage:||Ready for checkin|
|Has patch:||yes||Needs documentation:||no|
|Needs tests:||no||Patch needs improvement:||no|
tell() method is missing in the specific implementation of
TemporaryFile for Windows platforms, which causes crashes when using PIL, for example. Simple fix attached.