Function: ediff-valid-difference-p
ediff-valid-difference-p is a byte-compiled function defined in
ediff-init.el.gz.
Signature
(ediff-valid-difference-p &optional N)
Source Code
;; Defined in /usr/src/emacs/lisp/vc/ediff-init.el.gz
;; Verify that we have a difference selected.
(defsubst ediff-valid-difference-p (&optional n)
(or n (setq n ediff-current-difference))
(and (>= n 0) (< n ediff-number-of-differences)))