BussinessDateCalendar getRolledDate JavaDoc does not match implementation

[Snijder]

I ran into an issue during a refactor in our code base. I assumed the JavaDoc to be true, however the statement about zero business days is false.

	/**
	 * Find a new date by adding the given number of business days to a given base date.
	 *
	 * If baseDate is not a business date and businessDays is zero, the method returns the next business day.
	 *
	 * @param baseDate The starting date.
	 * @param businessDays The number of business days from the starting date (negative values are allowed).
	 * @return A date of a business day such that the number of business days between this one (including) and the start date (excluding) is businessDays.
	 */
	LocalDate getRolledDate(LocalDate baseDate, int businessDays);

The javadoc indicates that getRolledDate always returns a bussiness day, even if 0 business days are given.

Meanwhile in AbstractBusinessdayCalendar:

	@Override
	public LocalDate getRolledDate(final LocalDate baseDate, int businessDays) {
		LocalDate			rolledDate			= baseDate;
		final int					direction			= businessDays >= 0 ? 1: -1;
		final DateRollConvention	dateRollConvention	= direction > 0 ? DateRollConvention.FOLLOWING : DateRollConvention.PRECEDING;
		while(businessDays != 0) { // business day == 0 so while loop does not get executed
			rolledDate = rolledDate.plusDays(direction);
			rolledDate = getAdjustedDate(rolledDate, dateRollConvention);
			businessDays -= direction;
		}
		return rolledDate; // is still equal to the basedate.
	}

The implementation just returns the given date when there are 0 business days given.

I think by this point the JavaDoc should be fixed as changing the implementation will probably cause breakage.