message: Use CGAL::NT_converter to convert filtration values.
  Alpha_complex may produce something different from what the Simplex_tree expects, convert it explicitly.
diff: #include <CGAL/Epick_d.h>
  #include <CGAL/Spatial_sort_traits_adapter_d.h>
  #include <CGAL/property_map.h> // for CGAL::Identity_property_map
  +#include <CGAL/NT_converter.h>
  #include <iostream>
  #include <vector>
  @@ -323,8 +324,9 @@ class Alpha_complex {
  if (f_simplex_dim > 0) {
  // squared_radius function initialization
  Squared_Radius squared_radius = kernel_.compute_squared_radius_d_object();
  + CGAL::NT_converter<typename Geom_traits::FT, Filtration_value> cv;
  - alpha_complex_filtration = squared_radius(pointVector.begin(), pointVector.end());
  + alpha_complex_filtration = cv(squared_radius(pointVector.begin(), pointVector.end()));
  }
  complex.assign_filtration(f_simplex, alpha_complex_filtration);
  #ifdef DEBUG_TRACES
  