Bug 195613 drill through to toc in target report does not work properly[04]
steps to reproduce: use attached reports preview new_report_9.rptdesign in PDF click on actuate logo expected behavior: data item of 2nd page (toc) in target report is displayed actual behavior: target report was reached, but failed to navigated to the toc item
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/BirtUtility.java
* 
	 * @param task
	 * @param parameters
	 * @return
	 */
	public static boolean validateParameters( Collection parameterList,
			Map parameters )
	{
		assert parameters != null;
		boolean missingParameter = false;
		Iterator iter = parameterList.iterator( );
		while ( iter.hasNext( ) )
		{
			ParameterDefinition parameterObj = (ParameterDefinition) iter
					.next( );
			String parameterName = parameterObj.getName( );
			Object parameterValue = parameters.get( parameterName );
			
			if ( parameterObj.isHidden( ) )
			{
				continue;
			}
			if ( parameterValue == null && parameterObj.isRequired( ) )
			{
				missingParameter = true;
				break;
			}
			if ( parameterValue instanceof String )
			{
				String parameterStringValue = (String) parameterValue;