cmGrPlot.c : Fixed an apparent bug in cmGrPlotObjSetStateFlags() where _cmGrPlotObjSetFocus() was only called if the focus flag was already set when it appears it should only called when it is not already set.

cmGrPlot.c

     _cmGrPlotObjSetSelect(op, !fl );
 
   if( cmIsFlag(flags,kFocusGrPlFl) != (fl=_cmGrPlotObjIsFocused(op)) )
-    if( fl )
+    if( !fl )
       _cmGrPlotObjSetFocus(op);
   
 }