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/AbstractNode.java
public void flush( )
	{
		if ( !isStarted )
		{
			start( );
		}
		flushChildren( );
		end( );
	}
	protected abstract void flushChildren( );
	public void setParent( INode parent )
	{
		this.parent = parent;
	}
	public INode getParent( )
	{
		return parent;
	}
	public void start( )
	{
		if ( parent != null && !parent.isStarted( ) )
		{
			parent.start( );
		}
		ContentEmitterUtil.startContent( content, emitter );
		generator.start( content, isFirst );
		isStarted = true;
	}
}