Bug 196272 Text position is incorrect in postscript and ppt.
Text position need to be ajusted according to baseline position.
engine/org.eclipse.birt.report.engine.emitter.postscript/src/org/eclipse/birt/report/engine/emitter/postscript/PostscriptWriter.java
* 
	 * @see org.eclipse.birt.report.engine.emitter.postscript.IWriter#stopRenderer()
	 */
	public void stopRenderer( ) throws IOException
	{
		out.println( "%%Trailer" );
		out.println( "%%Pages: " + ( pageIndex - 1 ) );
		out.println( "%%EOF" );
		out.flush( );
	}
	public abstract class ImageSource
	{
		protected int height;
		protected int width;
		public ImageSource( int width, int height )
		{
			this.width = width;
			this.height = height;
		}
		public int getHeight( )
		{
			return height;
		}
		public int getWidth( )
		{
			return width;
		}
		public abstract int getRGB( int x, int y );
	}
	public class ArrayImageSource extends ImageSource