Bug 158102 [Regression]Html visibility effects seems to take no effects to all items
Html visibility effects seems to take no effects to all items Steps to reproduce: 1.new a report 2.add report items and set html visibility to them Expected result: Html visibility should take effects Actual result: No effects were displayed to all items
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/parser/EngineIRVisitor.java
* @return null only if the iterator is null or it contains no rules,
	 *         otherwise VisibilityDesign
	 */
	protected VisibilityDesign createVisibility(
			Iterator visibilityRulesIterator )
	{
		if ( visibilityRulesIterator != null )
		{
			VisibilityDesign visibility = new VisibilityDesign( );
			while ( visibilityRulesIterator.hasNext( ) )
			{
				VisibilityRuleDesign hide = createHide( (HideRuleHandle) visibilityRulesIterator
						.next( ) );
				visibility.addRule( hide );
			}
			if ( visibility.count( ) == 0 )
			{
				return null;
			}
			return visibility;
		}
		return null;
	}
	/**
	 * Creates the visibility rule( i.e. the hide)
	 * 
	 * @param handle
	 *            the DE's handle
	 * @return the created visibility rule
	 */