Bug 193886 NPE is thrown when preview external CSS style in ppt[1205]
engine/org.eclipse.birt.report.engine.emitter.ppt/src/org/eclipse/birt/report/engine/emitter/ppt/PPTRender.java
* @return the measure in PPT
	 */
	private double pptMeasure( float layoutMeasure )
	{
		return layoutMeasure / lToP;
	}
	/**
	 * Converts the X coordinate of a point from layout to X coordinate in PPT.
	 * 
	 * @param layoutX
	 *            the X coordinate specified from layout
	 * @return the PPT X coordinate
	 */
	private double layoutPointX2PPT( int layoutX )
	{
		return pptMeasure( layoutX );
	}
	/**
	 * Converts the Y coordinate of a point from layout to Y coordinate in PPT.
	 * 
	 * @param layoutY
	 *            the Y coordinate specified from layout
	 * @return the PPT Y coordinate
	 */
	private double layoutPointY2PPT( float layoutY )
	{
		return pptMeasure( layoutY );
	}
	/**
	 * Converts the left X coordinate of an Area from layout to the left X