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/device/PPTPage.java
int width, Color color, String lineStyle )
	{
		writer.drawLine( convertToPoint( startX ),
				convertToPoint( startY ),
				convertToPoint( endX ),
				convertToPoint( endY ),
				convertToPoint( width ),
				color,
				lineStyle );
	}
	public void drawText( String text, int textX, int textY, int width,
			int height, TextStyle textStyle )
	{
		writer.drawText( text,
				convertToPoint( textX ),
				convertToPoint( textY ),
				convertToPoint( width ),
				convertToPoint( height ),
				textStyle.getFontInfo( ),
				textStyle.getColor( ),
				textStyle.isLinethrough( ),
				textStyle.isOverline( ),
				textStyle.isUnderline( ) );
	}
	private float convertToPoint( int value )
	{
		return value / PDFConstants.LAYOUT_TO_PDF_RATIO;
	}
}