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/CascadingParametersDialog.java
}
					catch ( SemanticException e )
					{
						ExceptionHandler.handle( e );
						return;
					}
					clearNewParameter( );
				}
			}
			refreshValueTable( );
			refreshParameterProperties( );
			updateButtons( );
		}
	};
	private void clearNewParameter( )
	{
		newParameter = null;
	}
	protected int getTableIndex( Object element )
	{
		Object[] input = ( (IStructuredContentProvider) valueTable.getContentProvider( ) ).getElements( valueTable.getInput( ) );
		int index = 0;
		if ( element != newParameter )
		{
			for ( int i = 0; i < input.length; i++ )
			{
				if ( element == input[i] )
				{
					index = i;
					break;