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
Position position = (Position) iterator.next( );
				drawImage( imageSource, position.getX( ), position.getY( ),
						imageSize.getX( ), imageSize.getY( ), null );
			}
			out.println( "cliprestore" );
			gRestore( );
		}
		finally
		{
			if ( imageStream != null )
			{
				imageStream.close( );
				imageStream = null;
			}
		}
	}
	/**
	 * Draws a line from (startX, startY) to (endX, endY).
	 * 
	 * @param startX
	 *            the x coordinate of start point.
	 * @param startY
	 *            the y coordinate of start point.
	 * @param endX
	 *            the x coordinate of end point.
	 * @param endY
	 *            the y coordinate of end point.
	 */
	public void drawLine( float startX, float startY, float endX, float endY )
	{