Minor update of plshade* documentation changing all width parameters from PLINT to PLFLT in accordance with recent code change.
Minor update of plshade* documentation changing all width parameters
from PLINT to PLFLT in accordance with recent code change.

svn path=/trunk/; revision=12327

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