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
else
		{
			curPos = new ContainerPosition( 0, 0 );
		}
		
		int x = curPos.x + textArea.getX( );
		int y = curPos.y + textArea.getY( );
		drawTextAt( textArea, x, y );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.layout.area.IAreaVisitor#visitImage(org.eclipse.birt.report.engine.layout.area.IImageArea)
	 */
	public void visitImage( IImageArea imageArea )
	{
		drawImage( imageArea );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.layout.area.IAreaVisitor#visitAutoText(org.eclipse.birt.report.engine.layout.area.ITemplateArea)
	 */
	public void visitAutoText( ITemplateArea templateArea )
	{