[issue5999] compile error on HP-UX 11.22 ia64 - 'mbstate_t' is used as a type, but has not been defined as a type

[Sridhar Ratnakumar]

Changes by Sridhar Ratnakumar <sridharr at activestate.com>:


Added file: http://bugs.python.org/file14431/_mbstate_t.h

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<http://bugs.python.org/issue5999>
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