Test segfault 27
================

Segfault reported in https://github.com/Normaliz/PyNormaliz/issues/27

>>> import PyNormaliz
>>> nf = [ "a4-5a2+5", "a", "1.9021+/-0.01" ]
>>> C = PyNormaliz.NmzCone(number_field=nf, cone=[[[1],[0,1]],[[1],[-1]]])
>>> PyNormaliz.NmzResult(C, "ExtremeRays") == [[[[0,5], [5,5], [0,5],[-1,5]],
...  [[1,1], [0,1], [0,1],[0,1]]], [[[1,1], [0,1], [0,1],[0,1]],
...  [[-1,1], [0,1], [0,1],[0,1]]]]
True
