Take BGBRIGHT and NOBRIGHT video flags into account when updating the 32-bit

colour.  In general, this should work as exepected, except if you use XTerm
256-colour extensions to set the colour to the current standard one, then
adjust the appropriate flag, the colour will change.  I don't know if that's
expected or not to be honest.

Anyway, this fixes rendering of tcf - 22 - amidala.XB