MixMax RNG with variate_generator returns constant values when initialised with seed = 0 #104

#include <boost/random.hpp>
#include <iostream>
int main() {
 using boost::normal_distribution;
 using boost::random::uniform_real_distribution;
 using boost::variate_generator;
 using boost::random::mixmax;
 mixmax rng(0);
 variate_generator<mixmax&, normal_distribution<> > norm_rng(rng, normal_distribution<>(5, 10));
 variate_generator<mixmax&, uniform_real_distribution<> > unif_rng(rng, uniform_real_distribution<>(5.0, 10.0));
 for (size_t i = 0; i < 5; ++i) {
 std::cout << "Normal(5,10): " << norm_rng() << "\n"
 << "Uniform(5,10): " << unif_rng() << "\n";
 }
 std::cout << std::endl;
 return 0;
}

Normal(5,10): 5
Uniform(5,10): 5
Normal(5,10): 5
Uniform(5,10): 5
Normal(5,10): 5
Uniform(5,10): 5
Normal(5,10): 5
Uniform(5,10): 5
Normal(5,10): 5
Uniform(5,10): 5