Bug 153523 OK button in parameter dialog is enabled without default value in combo-box
Description: OK button in parameter dialog is enabled without default value in combo-box Steps to reproduce: 1. New a report parameter, combo-box. 2. Click New button, input abc as value, click OK 3. Set abc as default value and close Edit Parameter dialog. 4. New a data source and dataset 5. Edit the parameter, remove abc value and import values from dataset Expected result: OK button is disabled for there is no default value. Actual result: OK button is enabled.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
else
			{
				int index = controlTypeChooser.indexOf( originalSelection );
				if ( index == -1 )
				{
					
					controlTypeChooser.select( 0 );
					return true;
				}
				controlTypeChooser.setText( originalSelection );
			}
		}
		return false;
	}
	private void makeUniqueAndValid( )
	{
		for ( Iterator iter = choiceList.iterator( ); iter.hasNext( ); )
		{
			SelectionChoice choice = (SelectionChoice) iter.next( );
			if ( isValidValue( choice.getValue( ) ) != null
					|| containValue( choice, choice.getValue( ), COLUMN_VALUE ) )
			{
				iter.remove( );
			}
		}
	}
	private void changeControlType( )
	{
		if ( isStatic( ) )
		{