message: Fix segment node numbering
diff: @@ -8600,8 +8600,13 @@ int ConvertToVTKOrdering(int idx_in, int ref, Geometry::Type geom)
  switch (geom)
  {
  case Geometry::POINT:
  - case Geometry::SEGMENT:
  return idx_in;
  + case Geometry::SEGMENT:
  + if (idx_in == 0 || idx_in == ref)
  + {
  + return idx_in ? 1 : 0;
  + }
  + return idx_in + 1;
  case Geometry::SQUARE:
  {
  // Cf: https://git.io/JvZLT
  