Call setViewBox when that function is available (e.g., version 4.5.0 or greater of Qt4) for the svgqt case.  This makes a substantial difference in the scaling of svgqt results, and makes that scaling agree with the results for -dev svgcairo and -dev svg.
Call setViewBox when that function is available (e.g., version 4.5.0 or
greater of Qt4) for the svgqt case.  This makes a substantial difference in
the scaling of svgqt results, and makes that scaling agree with the results
for -dev svgcairo and -dev svg.


svn path=/trunk/; revision=9773

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