Changed the order of driver calls on a grclr().  The plot buffer clear must come first.
Changed the order of driver calls on a grclr().  The plot buffer clear
must come first.

svn path=/trunk/; revision=130

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