* fix out of bounds index into vector of dimension id's.
* added a check to prevent out of bounds access into coordvals
  array (x-axis values) when it's a different length than the
  variable (y-axis values). in that case id values are used
  instead.


git-svn-id: http://visit.ilight.com/svn/visit/trunk/src@23756 18c085ea-50e0-402c-830e-de6fd14e8384