[issue29034] Fix memory leak in path_converter

[Xiang Zhang]

Xiang Zhang added the comment:

v2 applies the comments. And another separate change is to change PyUnicode_AsWideCharString to PyUnicode_AsUnicodeAndSize.

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title: refleak in path_converter on error case -> Fix memory leak in path_converter
Added file: http://bugs.python.org/file45983/path_converter-v2.patch

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<http://bugs.python.org/issue29034>
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