VS2017 reports typecast error in two_bit_color_map.hpp

[peter.johnson@…]

line 61 of boost/graph/two_bit_color_map.hpp, final parameter causes an int32 to unsigned char type conversion warning.

Maybe resolved by changing line 61 to:

std::fill(data.get(), data.get() + (n + elements_per_char - 1) / elements_per_char, static_cast<unsigned char>(white_color));