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.ppt/src/org/eclipse/birt/report/engine/emitter/ppt/PPTWriter.java
* @param text
	 *            the textArea to be drawn.
	 * @param textX
	 *            the X position of the textArea relative to current page.
	 * @param textY
	 *            the Y position of the textArea relative to current page.
	 * @param contentByte
	 *            the content byte to draw the text.
	 * @param contentByteHeight
	 *            the height of the content byte.
	 */
	public void drawText( String text, float textX, float textY, float width,
			float height, FontInfo fontInfo, Color color, boolean linethrough,
			boolean overline, boolean underline )
	{
		BaseFont baseFont = fontInfo.getBaseFont( );
		String fontName = getFontName( baseFont );
		
		
		
		String red = Integer.toHexString( color.getRed( ) );
		String green = Integer.toHexString( color.getGreen( ) );
		String blue = Integer.toHexString( color.getBlue( ) );
		red = red.length( ) == 1 ? "0" + red : red; 
		green = green.length( ) == 1 ? "0" + green : green; 
		blue = blue.length( ) == 1 ? "0" + blue : blue; 
		Charset charset = Charset.forName( "UTF-8" );
		ByteBuffer encodedText = charset.encode( text );
		try
		{