message: try to fix Alpha_complex_test_unit on windows
diff: // Use dynamic_dimension_tag for the user to be able to set dimension
  typedef CGAL::Epick_d< CGAL::Dynamic_dimension_tag > Kernel_d;
  // Use static dimension_tag for the user not to be able to set dimension
  -typedef CGAL::Epick_d< CGAL::Dimension_tag<2> > Kernel_s;
  +typedef CGAL::Epick_d< CGAL::Dimension_tag<3> > Kernel_s;
  // The triangulation uses the default instantiation of the TriangulationDataStructure template parameter
  typedef boost::mpl::list<Kernel_d, Kernel_s> list_of_kernel_variants;
  