Bug 140974 bad assert in ScalarParameterFragment
The following assert appears around line 98 in org.eclipse.birt.report.viewer.aggregation.parameter.ScalarParameterFragment assert paramDefaultValueObj instanceof String; If the report does not have a default value for the parameter in the report, then this assert fails even though the code that follows it explicitly handles a null value. Since null is a valid value, the assert should be assert (paramDefaultValueObj == null) || (paramDefaultValueObj instanceof String);
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/presentation/aggregation/parameter/ScalarParameterFragment.java
* @exception ServletException
	 * @exception IOException
	 */
	protected void doService( HttpServletRequest request,
			HttpServletResponse response ) throws ServletException, IOException
	{
		ViewerAttributeBean attrBean = (ViewerAttributeBean) request
				.getAttribute( "attributeBean" ); 
		assert attrBean != null;
		assert parameter != null;
		ScalarParameterBean parameterBean = new ScalarParameterBean( parameter );
		attrBean.setParameterBean( parameterBean );
		Locale locale = attrBean.getLocale( );
		boolean isDesigner = attrBean.isDesigner( );
		try
		{
			prepareParameterBean( attrBean.getReportDesignHandle( ),
					getReportService( ), request, parameterBean, parameter,
					locale, isDesigner );
			
			prepareParameterBean( request, getReportService( ), parameterBean,
					locale );
		}
		catch ( ReportServiceException e )
		{
			
			e.printStackTrace( );
		}
	}
	/**