Bug 199363 [Automation][Regression] list and table group page break will yield empty page
steps to reproduce: - use the attached report design - preview in web viewer expected behavior: - page break behavior is correct actual behavior: - empty pages were rendered
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/html/buffer/PageNode.java
{
	public PageNode( IContent content, IContentEmitter emitter,
			PageHintGenerator generator )
	{
		super( content, emitter, generator );
	}
	public void end( )
	{
		ContentEmitterUtil.endContent( content, emitter );
	}
	public void start( )
	{
		if ( parent != null && !parent.isStarted( ) )
		{
			parent.start( );
		}
		ContentEmitterUtil.startContent( content, emitter );
		isStarted = true;
	}
}