Commit Rafael's suggested logic change for improving the default for aclocal_opts.  The new code works for me, and the logic looks good.
Commit Rafael's suggested logic change for improving the default for
aclocal_opts.  The new code works for me, and the logic looks good.

svn path=/trunk/; revision=4719

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