Fix up plslabelfunc support in f95 so it compiles with gfortran.
Fix up plslabelfunc support in f95 so it compiles with gfortran.


svn path=/trunk/; revision=10604

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