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
pptOutput.write( ( "<v:shape id=3D'" + ( shapeCount ) + "' type=3D'#r'\n" ).getBytes( ) ); 
			pptOutput.write( ( " style=3D'position:absolute;left:" + x + "pt;top:" + y + "pt;width:" + width + "pt;height:" + height + "pt'\n" ).getBytes( ) ); 
			pptOutput.write( ( " filled=3D'f' stroked=3D'f'>\n" ).getBytes( ) ); 
			pptOutput.write( ( "<v:imagedata src=3D\"" + imageName + "\" o:title=3D\"" + imageTitle + "\"/>\n" ).getBytes( ) ); 
			pptOutput.write( ( "<o:lock v:ext=3D'"
					+ "edit"
					+ "' aspectratio=3D't"
					+ "'/>\n" ).getBytes( ) );
			pptOutput.write( ( "</v:shape>\n" ).getBytes( ) ); 	
		}
		catch ( IOException ioe )
		{
			logger.log( Level.WARNING, ioe.getMessage( ), ioe );
		}
	}
	/**
	 * Converts the layout measure to PPT, the measure of layout is 1000 times
	 * larger than that of PPT.
	 * 
	 * @param layoutMeasure
	 *            the measure computed in layout manager