Bug 192797 The pyramid chart highlight is error[0602]
Description: The pyramid chart highlight is error[0602] Create a sample pyramid chart and see the attached screen shot.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/BaseRenderer.java
* @return
	 */
	protected Location[] filterNull( Location[] ll )
	{
		ArrayList al = new ArrayList( );
		for ( int i = 0; i < ll.length; i++ )
		{
			if ( Double.isNaN( ll[i].getX( ) ) || Double.isNaN( ll[i].getY( ) ) )
			{
				continue;
			}
			al.add( ll[i] );
		}
		if ( ll instanceof Location3D[] )
		{
			return (Location3D[]) al.toArray( new Location3D[al.size( )] );
		}
		return (Location[]) al.toArray( new Location[al.size( )] );
	}
	/**
	 * Check the if the given value is NaN.
	 * 
	 * @param value
	 * @return
	 */
	protected static boolean isNaN( Object value )
	{
		return ( value == null )
				|| ( value instanceof Number && Double.isNaN( ( (Number) value ).doubleValue( ) ) );
	}