message: simplify: Fix assertion in simplifyPoints
  When simplifyPoints was called with target vertex count 0, we hit an
  assertion inside the binary search loop - this needs a loop precondition
  check similarly to simplifySloppy.
diff: @@ -1443,6 +1443,9 @@ size_t meshopt_simplifyPoints(unsigned int* destination, const float* vertex_pos
  size_t target_cell_count = target_vertex_count;
  + if (target_cell_count == 0)
  + return 0;
  +
  meshopt_Allocator allocator;
  Vector3* vertex_positions = allocator.allocate<Vector3>(vertex_count);
  