(dired-diff): Require diff.

diff --git a/lisp/dired-aux.el b/lisp/dired-aux.el
index ea5aca6..9718c71 100644 (file)
--- a/lisp/dired-aux.el
+++ b/lisp/dired-aux.el
@@ -50,6 +50,7 @@ With prefix arg, prompt for second argument SWITCHES,
    (let ((default (if (mark t)
                      (save-excursion (goto-char (mark t))
                                      (dired-get-filename t t)))))
+     (require 'diff)
      (list (read-file-name (format "Diff %s with: %s"
                                   (dired-get-filename t)
                                   (if default