message: Core: fixed minor compile warnings in Hamiltonian API.
diff: @@ -351,7 +351,7 @@ void Hamiltonian_Set_DDI(State *state, float radius, int idx_image, int idx_chai
  vectorfield normals(0);
  scalar magnitude;
  Vector3 normal;
  - for (int i=0; i<neighbours.size(); ++i)
  + for (unsigned int i=0; i<neighbours.size(); ++i)
  {
  Engine::Neighbours::DDI_from_Pair(*image->geometry, {neighbours[i].iatom, neighbours[i].ineigh, neighbours[i].translations}, magnitude, normal);
  magnitudes.push_back(magnitude);
  @@ -602,12 +602,12 @@ void Hamiltonian_Get_DDI(State *state, float * radius, int idx_image, int idx_ch
  {
  auto ham = (Engine::Hamiltonian_Heisenberg_Neighbours*)image->hamiltonian.get();
  - *radius = ham->ddi_radius;
  + *radius = (float)ham->ddi_radius;
  }
  else if (image->hamiltonian->Name() == "Heisenberg (Pairs)")
  {
  auto ham = (Engine::Hamiltonian_Heisenberg_Neighbours*)image->hamiltonian.get();
  - *radius = ham->ddi_radius;
  + *radius = (float)ham->ddi_radius;
  }
  }
  \ No newline at end of file
  