Bug 181706 Sorting Data by X values doesn't work without grouping
Using the 2.2M5 designer , I simply want to sort the data of the X Series in a Line Chart. I go into the Sort and Group pop up in the chart wizard and select ascending, but it doesn't affect the result. (style ordered same as the result set) If i define a dummy grouping (no interval) it is then working.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/internal/datafeed/DataProcessor.java
}
	/**
	 * The constructor.
	 * 
	 * @param rtc
	 */
	public DataProcessor( RunTimeContext rtc, IActionEvaluator iae )
	{
		this.rtc = rtc;
		this.iae = iae;
	}
	/**
	 * Returns all valid trigger expressions from series.
	 */
	public static String[] getSeriesTriggerExpressions( Series se,
			IActionEvaluator iae )
	{
		ArrayList rt = new ArrayList( );
		if ( se != null && iae != null )
		{
			for ( Iterator itr = se.getTriggers( ).iterator( ); itr.hasNext( ); )
			{
				Trigger tg = (Trigger) itr.next( );
				String[] expra = iae.getActionExpressions( tg.getAction( ),
						StructureSource.createSeries( se ) );
				if ( expra != null && expra.length > 0 )
				{
					for ( int i = 0; i < expra.length; i++ )
					{
						String expr = expra[i];