curses_temporaryfile.patch: Call tempfile.TemporaryFile in getwin() and putwin() to create the temporary file in a more portable and safer manner.

The curses library requires a FILE* object, but TemporaryFile.close() must be called to remove the temporary file. So I chose to duplicate the file descriptor, so we can close fclose() and tmpfile.close().

I chose to modify the C rather rather than trying to implement a window class in Python, because the C window class is part of a "PyCurses_API", and many C functions instanciate the C class.