Comment out line draw which was acting as a visual debugging cue for the direction of the gradient.
Comment out line draw which was acting as a visual debugging cue for
the direction of the gradient.

svn path=/trunk/; revision=11738

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