;;; use that here, so that the compiler is born knowing this value.
;;; FIXME: Add a comment telling whether this holds for all vectors
;;; or only for vectors based on simple arrays (non-adjustable, etc.).
;;; use that here, so that the compiler is born knowing this value.
;;; FIXME: Add a comment telling whether this holds for all vectors
;;; or only for vectors based on simple arrays (non-adjustable, etc.).