Changed documentation slightly, and inserted #ifndef _POSIX_SOURCE before the define of _POSIX_SOURCE for an eensy weensy little bit of added safety.
Changed documentation slightly, and inserted #ifndef _POSIX_SOURCE before
the define of _POSIX_SOURCE for an eensy weensy little bit of added safety.

svn path=/trunk/; revision=188

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