(temp-buffer-show-function, display-buffer-function): Fix :type.

diff --git a/lisp/cus-start.el b/lisp/cus-start.el
index 20bc6ade7402383ed91e85c444ee5814ece8f81f..ce0a22062088ef89ca5b39b8e8a6e6abd2699c52 100644 (file)
--- a/lisp/cus-start.el
+++ b/lisp/cus-start.el
@@ -191,8 +191,8 @@
             (parse-sexp-ignore-comments editing-basics boolean)
             (words-include-escapes editing-basics boolean)
             ;; window.c
-            (temp-buffer-show-function windows function)
-            (display-buffer-function windows function)
+            (temp-buffer-show-function windows (choice (const nil) function))
+            (display-buffer-function windows (choice (const nil) function))
             (pop-up-frames frames boolean)
             (pop-up-frame-function frames function)
             (special-display-buffer-names