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/core/DesignElement.java
* @param propName
	 *            the name of the property to get
	 * @return the property value as a boolean. Returns false if the property is
	 *         not set, or not defined, or cannot convert to a boolean.
	 */
	public boolean getBooleanProperty( Module module, String propName )
	{
		ElementPropertyDefn prop = getPropertyDefn( propName );
		if ( prop == null )
			return false;
		PropertyType type = MetaDataDictionary.getInstance( ).getPropertyType(
				prop.getTypeCode( ) );
		Object value = getProperty( module, propName );
		return ( (BooleanPropertyType) type ).toBoolean( module, value );
	}
	/**
	 * Gets the value of a property as a list.
	 * 
	 * @param module
	 *            the module
	 * @param propName
	 *            the name of the property to get
	 * @return the value as an <code>ArrayList</code>, or null if the
	 *         property is not set or the value is not a list
	 */
	public List getListProperty( Module module, String propName )
	{
		Object value = getProperty( module, propName );
		if ( value == null )
			return null;