Bug 178519 Problems in multi-rows header
Please see the attachments.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/PDFRowLM.java
implements
			IInlineStackingLayoutManager
{
	protected PDFTableLM tbl;
	protected boolean hasNext = false;
	public PDFRowLM( PDFLayoutEngineContext context, PDFStackingLM parent,
			IContent content, IReportItemExecutor executor )