#9 gluTessCallback, # of args for vertex

[Mike C. Fletcher]

The vertex callback setup with gluTessCallback(
tesObject, GLU_TESS_VERTEX, callback) is supposed to
be handed one argument (the vertex data). Instead,
it's handed back 4 arguments, with the 2, 3 and 4th
being None in all cases I've tested.

Workaround is to just define garbage params, but it
should be fixed.

[Mike C. Fletcher]

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Additional notes: Behaviour depends on the data passed to
gluTessVertex, a tuple of length x passed in gets unpacked
into x args, so in the original report, I'd passed in a 4-
element tuple, thus getting 4 arguments. Workarounds
possible in any given case, but should still be fixed.

[Tarn Weisner Burton]

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Was due to incorrect usage of PyObject_CallFunction. Now
fixed in build 28.

Tarn