message: Fix #if cgal_version
diff: @@ -108,18 +108,16 @@ class Alpha_kernel_d<Kernel, true> {
  template<class PointIterator>
  Sphere get_sphere(PointIterator begin, PointIterator end) const {
  // power_center_d_object has been renamed between CGAL 5.1 and 5.2
  -#if defined CGAL_VERSION_NR >= 1050101000 && defined CGAL_VERSION_NR < 1050201000
  +#if CGAL_VERSION_NR < 1050201000
  return kernel_.power_center_d_object()(begin, end);
  -#endif
  -#if CGAL_VERSION_NR >= 1050201000
  +#else
  return kernel_.construct_power_sphere_d_object()(begin, end);
  #endif
  }
  template<class PointIterator>
  FT get_squared_radius(PointIterator begin, PointIterator end) const {
  - Sphere sph = get_sphere(begin, end);
  - return sph.weight();
  + return get_sphere(begin, end).weight();
  }
  FT get_squared_radius(const Sphere& sph) const {
  @@ -128,10 +126,9 @@ class Alpha_kernel_d<Kernel, true> {
  bool is_gabriel(const Sphere& circumcenter, const Weighted_point_d& point) {
  // power_center_d_object has been renamed between CGAL 5.1 and 5.2
  -#if defined CGAL_VERSION_NR >= 1050101000 && defined CGAL_VERSION_NR < 1050201000
  +#if CGAL_VERSION_NR < 1050201000
  return kernel_.power_distance_d_object()(circumcenter, point) >= 0;
  -#endif
  -#if CGAL_VERSION_NR >= 1050201000
  +#else
  return kernel_.compute_power_product_d_object()(circumcenter, point) >= 0;
  #endif
  }
  