Made some changes to the initialisation of the colour map. The changes will restore a "black" to the palette if the bacground is white(ie set through -bg) and an optional -hack allows the swapping of red with black.
Made some changes to the initialisation of the colour map. The changes will
restore a "black" to the palette if the bacground is white(ie set through
-bg) and an optional -hack allows the swapping of red with black.

svn path=/trunk/; revision=2790

FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot