Bug 140620 Chart scripting errors are ignored
Write a chart with an invalid script, the execution simply ignores the script. This makes it difficult to debug scripting. The error message is also not precise and needs improvements.
chart/org.eclipse.birt.chart.device.swt/src/org/eclipse/birt/chart/device/swt/SwtEventHandler.java
* @see org.eclipse.swt.events.MouseTrackListener#mouseEnter(org.eclipse.swt.events.MouseEvent)
	 */
	public void mouseEnter( MouseEvent e )
	{
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.swt.events.MouseTrackListener#mouseExit(org.eclipse.swt.events.MouseEvent)
	 */
	public void mouseExit( MouseEvent e )
	{
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.swt.events.MouseTrackListener#mouseHover(org.eclipse.swt.events.MouseEvent)
	 */
	public void mouseHover( MouseEvent e )
	{
	}
	private final void toggleHighlight( RegionAction ra )
	{
		if ( ra == null )
		{
			return;
		}
		final StructureSource src = ra.getSource( );
		if ( src.getType( ) == StructureType.SERIES
				|| src.getType( ) == StructureType.SERIES_DATA_POINT )