Bug 139391 [Regression]Chart interactivity didn't work well
Steps to reproduce: 1.Add a chart, add a drill-through interactivity to chart title 2.Preview in Web Viewer, click chart title Expected result: Link to the target report, and the report display in a new window correctly Actual result: Link to the target report in the "_self" window, and display the target report incorrectly (see the sreenshot)
chart/org.eclipse.birt.chart.device.svg/src/org/eclipse/birt/chart/device/svg/SVGInteractiveRenderer.java
if ( wss.getParent( ) instanceof WrappedStructureSource )
					wss = (WrappedStructureSource) wss.getParent( );
				else
					wss = null;
			}
		}
		else if ( src.getType( ) == type )
			return src.getSource( );
		return null;
	}
	/**
	 * Locates a category design-time series corresponding to a given cloned run-time
	 * series.
	 * 
	 * @param seDT runtime Series
	 * @return category Series
	 */
	private Series findCategorySeries( Series seDT )
	{
		final Chart cmDT = _iun.getDesignTimeModel( );
		if ( cmDT instanceof ChartWithAxes )
		{
			return (Series) ( (SeriesDefinition) ( (ChartWithAxes) cmDT ).getBaseAxes( )[0].getSeriesDefinitions( )
					.get( 0 ) ).getSeries( ).get( 1 );
		}
		else
		{
			return (Series) ( (SeriesDefinition) ( (ChartWithoutAxes) cmDT ).getSeriesDefinitions( )
					.get( 0 ) ).getSeries( ).get( 1 );
		}