Make make-decoded-time use -1 for dst unless given

* lisp/calendar/time-date.el (make-decoded-time): DST -1 is the
value for "doesn't know", not nil (bug#55635).

diff --git a/lisp/calendar/time-date.el b/lisp/calendar/time-date.el
index ba7c48b290dc021678a83d221450d6b3291977fe..dc77a7c7e0a9feb9ab336c43d9e645b56bbe4b73 100644 (file)
--- a/lisp/calendar/time-date.el
+++ b/lisp/calendar/time-date.el
@@ -552,7 +552,7 @@ changes in daylight saving time are not taken into account."
 
 (cl-defun make-decoded-time (&key second minute hour
                                   day month year
-                                  dst zone)
+                                  (dst -1) zone)
   "Return a `decoded-time' structure with only the keywords given filled out."
   (list second minute hour day month year nil dst zone))