Bug 17256 Exception due to bug 17208
examples/org.eclipse.jface.examples.databinding/src/org/eclipse/jface/examples/databinding/nestedselection/TestMasterDetail.java
UpdateValueStrategy {
		protected IStatus doSet(IObservableValue observableValue, Object value) {
			IStatus result = super.doSet(observableValue, value);
			if (result.isOK()) {
				Object changed = observableValue;
				if (changed instanceof IObserving) {
					changed = ((IObserving) changed).getObserved();
				}
				System.out.println("changed: " + changed);
			}
			return result;
		}
	}
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		new TestMasterDetail().run();
	}
	private Shell shell = null; 
	private Table personsTable = null;
	private Label label1 = null;
	private Text name = null;
	private Label label2 = null;
	private Text address = null;
	private Label label3 = null;
	private Text city = null;