Correct from "input" to "output" designation of certain plcalc_world arguments.
Correct from "input" to "output" designation of certain plcalc_world arguments.

svn path=/trunk/; revision=5007

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