Small change to ensure that cmap0 palette "sticks" when plot is saved from Tk driver.
Small change to ensure that cmap0 palette "sticks" when plot is saved from
Tk driver.

svn path=/trunk/; revision=1066

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