- s->mix_1_1_f = copy_double;
- s->mix_2_1_f = sum2_double;
- s->mix_any_f = get_mix_any_func_double(s);
+ s->mix_1_1_f = (mix_1_1_func_type*)copy_double;
+ s->mix_2_1_f = (mix_2_1_func_type*)sum2_double;
+ s->mix_any_f = (mix_any_func_type*)get_mix_any_func_double(s);