boost::random::xor_combine max() has wrong

[bolero.murakami@…]

In haeder <boost/random/xor_combine.hpp> line139:

static result_type max BOOST_PREVENT_MACRO_SUBSTITUTION () { return (std::max)((URNG1::min)(), (URNG2::max)()); }

URNG1::min has wrong, maybe correctly is URNG1::max.

correct as below:

static result_type max BOOST_PREVENT_MACRO_SUBSTITUTION () { return (std::max)((URNG1::max)(), (URNG2::max)()); }

[Steven Watanabe]

Actually both are wrong in the general case. min and max both need to take shift into account.