Fix extra warning introduced by previous removal of set but not used variable. Also fix typos in comments.
Fix extra warning introduced by previous removal of set but not used variable. Also fix typos in comments.


svn path=/trunk/; revision=12101

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