Robert J. Quinn, Emmy-nominated director of the “Tonight Show Starring Johnny Carson” for more than two decades, died Oct. 21 of cancer at his Malibu home. He was 72.Quinn directed the “Tonight Show” from 1968 to 1992, when Carson left the show and retired. Quinn was nominated for an Emmy in 1992. “He was not only the director of the ‘Tonight Show’ for over 20 years, but a close personal friend,” Carson said in a statement. Quinn is survived by his wife, Charlotte, and nine children.