message: demo: Fix MSVC /W4 warnings
diff: @@ -444,9 +444,9 @@ void packMesh(std::vector<PackedVertex>& pv, const std::vector<Vertex>& vertices
  pv[i].pz = meshopt_quantizeHalf(vertices[i].pz);
  pv[i].pw = 0;
  - pv[i].nx = meshopt_quantizeSnorm(vertices[i].nx, 8);
  - pv[i].ny = meshopt_quantizeSnorm(vertices[i].ny, 8);
  - pv[i].nz = meshopt_quantizeSnorm(vertices[i].nz, 8);
  + pv[i].nx = char(meshopt_quantizeSnorm(vertices[i].nx, 8));
  + pv[i].ny = char(meshopt_quantizeSnorm(vertices[i].ny, 8));
  + pv[i].nz = char(meshopt_quantizeSnorm(vertices[i].nz, 8));
  pv[i].nw = 0;
  pv[i].tx = meshopt_quantizeHalf(vertices[i].tx);
  