Bug 147833 Render attached report to pdf from document failed
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/PDFLineAreaLM.java
implements
			ILineStackingLayoutManager
{
	/**
	 * the base-level of the line created by this layout mangaer. each LineArea
	 * has a fixed base-level.
	 */
	private int baseLevel = Bidi.DIRECTION_LEFT_TO_RIGHT;
	/**
	 * line counter