Changed exit handler behavior.  Now it is called /prior/ to the stream cleanup, which is more useful.  Also it is passed the error message and is expected to return (if it returns) an exit code.  Prototype is: static int    (*exit_handler) (char *);
Changed exit handler behavior.  Now it is called /prior/ to the stream
cleanup, which is more useful.  Also it is passed the error message and
is expected to return (if it returns) an exit code.  Prototype is:
static int    (*exit_handler) (char *);

svn path=/trunk/; revision=802

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