bug#23820: 25.1.50; Fix caller to ediff-setup

[Tino Calancha <f92capac@gmail.com>]

Hello,

Seventh argument of ediff-setup is a hook: hilit-chg-get-diff-info
is passing a function.

emacs -Q -eval '(progn (with-temp-file "/tmp/foo" (insert "foo")) 
(switch-to-buffer "bar") (insert "bar"))'
M-: (highlight-compare-with-file "/tmp/foo")
;; error: (wrong-type-argument sequencep hilit-chg-get-diff-list-hk)

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
From d80c1fba56cecd245b90be8f3bddd159e1a9cbdd Mon Sep 17 00:00:00 2001
From: Tino Calancha <f92capac@gmail.com>
Date: Wed, 22 Jun 2016 13:04:03 +0900
Subject: [PATCH] Fix caller to ediff-setup

* lisp/hilit-chg.el (hilit-chg-get-diff-info-hook): New variable.
(hilit-chg-get-diff-info): Use it. (#Bug23820).
---
  lisp/hilit-chg.el | 7 ++++++-
  1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lisp/hilit-chg.el b/lisp/hilit-chg.el
index 8f042b6..1573b2e 100644
--- a/lisp/hilit-chg.el
+++ b/lisp/hilit-chg.el
@@ -313,6 +313,9 @@ highlight-changes-global-changes-existing-buffers
    :type 'boolean
    :group 'highlight-changes)

+(defvar hilit-chg-get-diff-info-hook nil
+  "Hook argument to `ediff-setup' in `hilit-chg-get-diff-info'.")
+
  ;; These are for internal use.

  (defvar hilit-chg-list nil)
@@ -913,7 +916,7 @@ hilit-chg-get-diff-info
    (let (hilit-e hilit-x hilit-y)
      (ediff-setup buf-a file-a buf-b file-b
  	       nil nil   ; buf-c file-C
-	       'hilit-chg-get-diff-list-hk
+	       hilit-chg-get-diff-info-hook
  	       (list (cons 'ediff-job-name 'something))
  	       )
      (ediff-with-current-buffer hilit-e (ediff-really-quit nil))
@@ -965,6 +968,8 @@ hilit-chg-get-diff-list-hk
      ;; No point in returning a value, since this is a hook function.
      ))

+(add-hook 'hilit-chg-get-diff-info-hook #'hilit-chg-get-diff-list-hk)
+
  ;; ======================= global-highlight-changes-mode ==============

  ;;;###autoload
-- 
2.8.1


In GNU Emacs 25.1.50.2 (x86_64-pc-linux-gnu, GTK+ Version 3.20.6)
Repository revision: 1c0199050bfa594287f3975aca56fc2a57ba0f66