[Fixes #110362306] In doDraw, check to see if the number of cases matches the number of features. If not, wipe out the existing features and reconstitute.
[Fixes #110362306] In doDraw, check to see if the number of cases matches the number of features. If not, wipe out the existing features and reconstitute.

concord-consortium/codap,concord-consortium/codap,concord-consortium/codap,concord-consortium/codap,concord-consortium/codap