Check for with-double when cheching for Qhull. Use AC_MSG_WARN instead of AC_MSG_RESULT in some places.
Check for with-double when cheching for Qhull.
Use AC_MSG_WARN instead of AC_MSG_RESULT in some places.

svn path=/trunk/; revision=4487

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