Corrigendum to: "On the boundedness of de la Vallee Poussin operators"

In studying some related topics, the authors came back to the paper "On the boundedness of de la Vallée Poussin operators'' [East J. Approx. 7 (2001), no. 4, 417--444] and realized a mistake in the proof of Theorem 2.2. In
this note we state the same theorem but slightly modifying the hypothesis on the involved weights.