Updated calls to private plplot utility functions (these now begin with "plP_").
Updated calls to private plplot utility functions (these now begin
with "plP_").

svn path=/trunk/; revision=518

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