[issue1512791] module wave does no rounding

[Neil Tallim]

Neil Tallim <red.hamsterx at gmail.com> added the comment:

Attached a patch with a unit test and solution for this problem.

Patch built against Python 3.2, r74246.

Note: with Python 3.2, an error was thrown if the input value wasn't an
integer because a deprecated struct-related cast was removed. It's
debatable whether we want to actually apply this patch, since the error
couldn't manifest in this version of Python. However, if we patch 2.7,
we might as well patch this to maintain consistency. (Patching 3.2 will
not break anything or make previously broken logic work differently, so
it is safe)

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Added file: http://bugs.python.org/file14591/1512791[3.2].diff

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