(customize-changed-options): Make arg optional.

diff --git a/lisp/cus-edit.el b/lisp/cus-edit.el
index 5b5a269a0c6b471525adadbe0e8208dc93de8a75..40ff46f1675ccf87480c5c30bae0d963bffc0150 100644 (file)
--- a/lisp/cus-edit.el
+++ b/lisp/cus-edit.el
@@ -1151,7 +1151,7 @@ the official name of the package, such as MH-E or Gnus.")
 (defalias 'customize-changed 'customize-changed-options)
 
 ;;;###autoload
-(defun customize-changed-options (since-version)
+(defun customize-changed-options (&optional since-version)
   "Customize all settings whose meanings have changed in Emacs itself.
 This includes new user option variables and faces, and new
 customization groups, as well as older options and faces whose meanings