Fix up a couple of function arguments types for f95 bindings and add  in the PL_NOTSET constant.
Fix up a couple of function arguments types for f95 bindings and add 
in the PL_NOTSET constant.


svn path=/trunk/; revision=9133

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