Bug 152948 Print as pdf not working for bar chart having Y-Series interactivity.
In BIRT2.1 release, a bar chart having a drill-through set on its Y-Series when rendered works fine, but on clicking the print as pdf option, produces a blank page. In the same report, if the drill-through is set on the chart area interactivity, everything including the print as pdf option works fine.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/ViewerHTMLActionHandler.java
protected boolean isEmbeddable = false;
	/**
	 * RTL option setting by the command line or URL parameter.
	 */
	protected boolean isRtl = false;
	/**
	 * if wanna use the master page, then set it to true.
	 */
	protected boolean isMasterPageContent = true;
	/**
	 * Constructor.
	 */
	public ViewerHTMLActionHandler( )
	{
	}
	/**
	 * Constructor. This is for renderTask.
	 * 
	 * @param document
	 * @param page
	 * @param locale
	 * @param isEmbeddable
	 * @param isRtl
	 * @param isMasterPageContent
	 */
	public ViewerHTMLActionHandler( IReportDocument document, long page,
			Locale locale, boolean isEmbeddable, boolean isRtl,
			boolean isMasterPageContent )
	{
		this.document = document;