Peter Maloney and Mare Winningham are the recipients of the annual Richard Seff Award presented by the Actors’ Equity Foundation to a veteran male and female character actor for the best performance in a supporting role in a Broadway or Off-Broadway production.  The announcement was made by Arne Gundersen, president of the Foundation, which administers the award.    The presentation, a check and crystal trophy, will take place at Equity’s Eastern Regional Board meeting at 2:00 PM on Tues June 10 at Equity’s office (165 West 46th St). Press contact: Helaine Feldman/Dick Moore & Assoc (212/719-9570)...