Test segfault 23
================

Segfault reported in https://github.com/Normaliz/PyNormaliz/issues/23

>>> from PyNormaliz import Cone, NmzCone, NmzResult
>>> V = [[-1, -1, 1], [-1, 0, 1], [-1, 1, 1], [0, -1, 1], [0, 0, 1], [0, 1, 1], [1, -1, 1], [1, 0, 1], [1, 1, 1]]
>>> cube1 = Cone(vertices=V)
>>> cube2 = NmzCone(vertices=V)
>>> NmzResult(cube2, "SupportHyperplanes") == [[-1, 0, 1], [0, -1, 1], [0, 1, 1], [1, 0, 1]]
True
>>> NmzResult(cube2, "Volume") == [8,1]
True
>>> len(cube1.Triangulation()[0]) == 8
True
