fixed but in ratbary2 when constructing l(x) in the first barycentric form when x is one of the nodes of either the numerator or the denominator.
fixed but in ratbary2 when constructing l(x) in the first barycentric form when x is one of the nodes of either the numerator or the denominator.

nickhale/chebfunV4,chebfun/chebfun_v4