Cannot change feature type of selected class when that are two existing classes.
 Feature type of first class is changed instead.

Steps to reproduce:
1.  Open a context file.
2.  Select a layer.
3.  Start Classifier.
4.  Change feature type to one of the vector type.
5.  Add a class.
6.  Start Symbolizer.
7.  Add a new style.
8.  Set parameters.
9.  Apply changes.
10. Save changes.
11. Stop Symbolizer.
12. Repeat steps 5 to 11.
13. Change feature type of selected class (which is the newly created class) to
something different of from vector type in 4.
14. Feature type of both classes are changed.

Chameleon, php_utils, Studio CVS 2004-03-05
Redhat 7.2