This American playwright has made occasional forays into motion pictures and TV with generally successful results. Murray Schisgal's profile benefited from his association with actor-director Dustin Hoffman beginning in the late 1960s on stage and culminating in 1982's comedy classic "Tootsie". (He shared final writing credit--and a Best Original Screenplay Oscar nomination--with Larry Gelbart and Don McGuire although there remains controversy over the contributions of each writer.) A native of Brooklyn, Schisgal turned to writing plays after careers as a musician, attorney and teacher. His