message: simplify: Add the number of complex vertices to trace output
  It's currently always zero but that'll change soon.
diff: @@ -1122,8 +1122,8 @@ size_t meshopt_simplify(unsigned int* destination, const unsigned int* indices,
  for (size_t i = 0; i < vertex_count; ++i)
  kinds[vertex_kind[i]] += remap[i] == i;
  - printf("kinds: manifold %d, border %d, seam %d, locked %d\n",
  - int(kinds[Kind_Manifold]), int(kinds[Kind_Border]), int(kinds[Kind_Seam]), int(kinds[Kind_Locked]));
  + printf("kinds: manifold %d, border %d, seam %d, complex %d, locked %d\n",
  + int(kinds[Kind_Manifold]), int(kinds[Kind_Border]), int(kinds[Kind_Seam]), int(kinds[Kind_Complex]), int(kinds[Kind_Locked]));
  #endif
  Vector3* vertex_positions = allocator.allocate<Vector3>(vertex_count);
  