Retiree Purchases Recliner He'll Eventually Die In   DADE CITY, FL-- Retiree Chuck Leyner, 66, treated himself Monday to a La-Z-Boy Cardinal Reclina-Rocker chair, in which he will die of heart failure approximately eight years from now. "Oh, this is gonna be so great to watch football in," Leyner said of the attractive, comfortable death recliner, boasting five leg settings and a luxuriously padded back which will absorb the shock of his final death throes. "This thing is gonna last for the rest of my life."