Bug 137444 Can not preview the old file with PDF
Details: Can not preview the old file with PDF Please run the attached file with PDF, it can not preview. But HTML and web view is no problem.
engine/org.eclipse.birt.report.engine.emitter.pdf/src/org/eclipse/birt/report/engine/emitter/pdf/PDFEmitter.java
{
	/**
	 * the default output pdf file name
	 */
	public static final String REPORT_FILE = "Report.pdf"; 
	
	/**
	 * the default image folder
	 */
	public static final String IMAGE_FOLDER = "image"; 
	
	/**
	 * the output stream
	 */
	private OutputStream output = null;
	
	/**
	 * the emitter configturation
	 */
	
	
	/**
	 * The ratio of layout measure to iText measure
	 */
	public static final float LAYOUT_TO_PDF_RATIO = 1000f;
	
	/**
	 * the pdf Document object created by iText
	 */
	private Document doc = null;