Force an "update" when widget is initially mapped, but before startup procedure is invoked.  Ensures that "." has been mapped and that X is in a sane state before continuing (otherwise new toplevels containing plframes can cause a core dump).  Also some cruft elimination.
Force an "update" when widget is initially mapped, but before startup
procedure is invoked.  Ensures that "." has been mapped and that X is
in a sane state before continuing (otherwise new toplevels containing
plframes can cause a core dump).  Also some cruft elimination.

svn path=/trunk/; revision=1045

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