Small glitch repaired in the filling of certain polygons (UL, clockwise)
Small glitch repaired in the filling of certain polygons (UL, clockwise)

svn path=/trunk/; revision=7381

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