Added defines for _HAVE_ISNAN, _HAVE_FINITE and _HAVE_ISINF. I don't know why we need that, since we define that already in config.h, but x21.c doesn't compile otherwise.
Added defines for _HAVE_ISNAN, _HAVE_FINITE and _HAVE_ISINF. I don't know why we need that, since we define that already in config.h, but x21.c doesn't compile otherwise.

svn path=/trunk/; revision=9611

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