Bug 123726 "Top n", "Bottom n" in highlight dialog doesn't work.
Description: "Top n", "Bottom n" in highlight dialog doesn't work. Steps to reproduce: 1. Add a highlight for a table. 2. Set highlight rule: "account_id", "top n", "3", let its font color red. 3. Preview the report, it doesn't work. Attached is design file.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/script/NEvaluator.java
case IConditionalExpression.OP_BOTTOM_PERCENT:
				instance = new BottomNEvaluator( );
				instance.n_percent = true;
				break;
			default:
				assert false;		
				return null;
		}
		
		instance.op_expr = op_expr;
		instance.n_expr = n_expr;
		instance.filterPassController = filterPassController;
		return instance;
	}
	
	
	/**
	 * Evaluate the given value
	 * @param value
	 * @param n
	 * @return
	 * @throws DataException
	 */
	public boolean evaluate( Context cx, Scriptable scope ) throws DataException
	{
		if( filterPassController.getForceReset() )
		{
			doReset();
			filterPassController.setForceReset( false );
		}