(display-time-filter): Ignore mail-spool-file if not string.

1 files changed, 4 insertions, 2 deletions

diff --git a/lisp/time.el b/lisp/time.el
index 77325f98a27..14a6a17d398 100644
--- a/lisp/time.el
+++ b/lisp/time.el
@@ -29,7 +29,8 @@
 
 (defvar display-time-mail-file nil
   "*File name of mail inbox file, for indicating existence of new mail.
-Default is system-dependent, and is the same as used by Rmail.")
+Non-nil and not a string means don't check for mail.  nil means use
+default, which is system-dependent, and is the same as used by Rmail.")
 
 ;;;###autoload
 (defvar display-time-day-and-date nil "\
@@ -127,7 +128,8 @@ would give mode line times like `94/12/30 21:07:48 (UTC)'.")
                               (getenv "MAIL")
                               (concat rmail-spool-directory
                                       (user-login-name))))
-         (mail (and (or (null display-time-server-down-time)
+         (mail (and (stringp mail-spool-file)
+                    (or (null display-time-server-down-time)
                         ;; If have been down for 20 min, try again.
                         (> (- (nth 1 (current-time))
                               display-time-server-down-time)