Bug 166443 Can not preview the multi master pages in PDF[05]
Description: A report design file include multi-master pages and one of them has the AutoText, if a element point to the master page which has no AutoText, the preview is failed. Build number: 2.1.2.v20061201-0710 2.2.0.v20061201-0710 Steps to reproduce: 1, New a report design with two master pages 2, The first master page include some AutoText in master page header 3, Left the second master page by default 4, In lay out use a Text element point to the second master page 5, Preview in PDF Expected result: It can be previewed successfully Actual result: Exception occurs when previewing the result in PDF
engine/org.eclipse.birt.report.engine.emitter.pdf/src/org/eclipse/birt/report/engine/emitter/pdf/PDFEmitter.java
{
			return pageHeight - pdfMeasure(layoutY);
		}
		
		/**
		 * Converts the left X coordinate of an Area from layout 
		 * to the left X coordinate in PDF
		 * @param layoutX 		the X coordinate specified from layout
		 * @return				the PDF X coordinate
		 */
		private float layoutAreaX2PDF(int layoutX)
		{
			return pdfMeasure(layoutX);
		}
		
		/**
		 * Converts the top Y coordinate of an Area from layout to the start Y coordinate in pdf. 
		 * to the bottom Y coordinate in PDF
		 * @param layoutY 		the Y coordinate specified from layout
		 * @param areaHeight	the height of the area whose coordinate need to be converted.
		 * 						To text area, the height is from the top of the text to
		 * 						the text's baseline.
		 * @return				the PDF Y coordinate
		 */
		private float layoutAreaY2PDF (int layoutY, int areaHeight)
		{
			return pageHeight - pdfMeasure(layoutY) - pdfMeasure(areaHeight);
		}
		
		/**