Correct bug in plot3d() with BASE_CONT option: The hidden line plotter plnxtv() only works OK if the x points are in increasing order. As this does not always happens, the situation must be detected and the line segment must be reversed before being plotted
Correct bug in plot3d() with BASE_CONT option:
The hidden line plotter plnxtv() only works OK if the x points are in increasing order.
As this does not always happens, the situation must be detected and the line segment
must be reversed before being plotted

svn path=/trunk/; revision=4057

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