
Fixed several mistakes related to the way the hash structure
%_plParseOpts_parse_mode was being handled.  Also improved the
prototype of plParseOpts_p, making it accept all leading parameters as
parse modes (passing a list of strings still works).

svn path=/trunk/; revision=2823

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