message: Adapt to changed surface interface
diff: @@ -21,9 +21,9 @@ using mat_type = matte<T>;
  using result_type = surface<N, M>;
  #elif defined WITH_TEX_COLOR
  template <typename N, typename M, int SIZE>
  - using param_type = array<surface<N, M, vec3f>, SIZE>;
  + using param_type = array<surface<N, vec3f, M>, SIZE>;
  template <typename N, typename M>
  - using result_type = surface<N, M, N>;
  + using result_type = surface<N, N/*TODO: in general TexCol != N*/, M>;
  #endif
  