Bug 168839 Chart Legend Toggle Visibility does not work correctly for Pie chart in SVG[0001]
Description: Chart Legend Toggle Visibility does not work correctly . Build number: 2.1.2.v20061221-0710 Steps to reproduce: 1. Preview the attached design file. 2. Click the legend. Expected result: Toggle Visibility works correctly. Actual result: Pie slice of different color disappears when being click. Error log: N/A
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/BaseRenderer.java
}
	}
	/**
	 * Filters the Null or invalid entry(contains NaN value) from the list. Each
	 * entry should be a double[2] or double[3] array object.
	 * 
	 * @param ll
	 * @return
	 */
	protected static List filterNull( List ll )
	{
		ArrayList al = new ArrayList( );
		for ( int i = 0; i < ll.size( ); i++ )
		{
			double[] obj = (double[]) ll.get( i );
			if ( obj == null || Double.isNaN( obj[0] ) || Double.isNaN( obj[1] ) )
			{
				continue;
			}
			al.add( obj );
		}
		return al;
	}
	/**
	 * Filters the Null or invalid entry(contains NaN value) from the array.
	 * 
	 * @param ll
	 * @return
	 */
	protected static Location[] filterNull( Location[] ll )