[issue10253] Fix fd leak in fileio.c and test resource warnings

[Brian Brazil]

Brian Brazil <brian.brazil at gmail.com> added the comment:

Version 2 of the patch is attached.

This fixes a warning at line 256 in test_fileio.py:
    f = _FileIO("/dev/tty", "a")
on my Hardy machine.

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Added file: http://bugs.python.org/file19433/fileio_fd_leak_v2.patch

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