message: Last cast which I forgot
diff: @@ -258,7 +258,7 @@ class MeshIntegrator {
  if (corner_index(j) < 0) {
  block_offset(j) = -1;
  corner_index(j) = corner_index(j) + voxels_per_side_;
  - } else if (corner_index(j) >= (IndexElement)voxels_per_side_) {
  + } else if (corner_index(j) >= static_cast<IndexElement>(voxels_per_side_)) {
  block_offset(j) = 1;
  corner_index(j) = corner_index(j) - voxels_per_side_;
  }
  