Dennis Haskins, who for more than a decade played the lovable but stern Principal Richard Belding on Saved by the Bell, has died, his agent, Jay Schachter, announced in a statement. He was 75. “It’s a tragic loss. Everyone loved Mr. Belding, and those of us who got to know Dennis loved him even more,” Schachter said. “He was a great person, and he loved, I mean absolutely LOVED his fans. He always had time for them, no matter what. He was my client and dear friend for over 20 years, and I will miss him terribly.” Details of his death were not provided. Haskins played Principal Belding first on the Disney Channel show Good Morning, Miss…