Bug 136241 [regression]Preview template in web viewer and pdf didn't get correct effect.
Description: Preview template items in web viewer and pdf didn't get correct effect. Steps to reproduce: 1. Create template items. 2. Preview in Web Viewer and pdf. Expected result: Same effect as in html. Actual result: In web viewer, see only blank box. In pdf, blank page.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/TemplateCommand.java
TemplateParameterDefinition templateParam = resolveTemplateParameterDefinition(
						module, ( (ElementRefValue) value ).getName( ) );
				if ( !( templateParam.getDefaultElement( ) instanceof ReportItem ) )
					throw new PropertyValueException(
							element,
							prop.getName( ),
							value,
							PropertyValueException.DESIGN_EXCEPTION_INVALID_VALUE );
			}
		}
		if ( ( element instanceof SimpleDataSet || element instanceof TemplateDataSet )
				&& DesignElement.REF_TEMPLATE_PARAMETER_PROP.equals( prop
						.getName( ) ) )
		{
			assert value instanceof ElementRefValue;
			if ( ( (ElementRefValue) value ).getElement( ) == null )
			{
				
				
				
				
				
				
				TemplateParameterDefinition templateParam = resolveTemplateParameterDefinition(
						module, ( (ElementRefValue) value ).getName( ) );
				if ( !( templateParam.getDefaultElement( ) instanceof SimpleDataSet ) )
					throw new PropertyValueException(
							element,
							prop.getName( ),