Reverted the changes about the use of `org-deadline-warning-days'

in `org-agenda-to-appt'.

ChangeLog

@@ -2,8 +2,6 @@
 
 	* org.el (org-agenda-to-appt): New argument `refresh' let the user
 	delete previous appointments stored in `appt-time-msg-list'.
-	Remove :deadline from the args of `org-agenda-get-day-entries'
-	instead of setting `org-deadline-warning-days' to nil.
 	(org-deadline-warning-days): Mention the fact that a value of zero
 	will be treated like negative values.
 	(org-show-todo-tree): Fix a small typo in the docstring.

org.el

@@ -18606,6 +18606,7 @@ belonging to the \"Work\" category."
       (setq filter (read-from-minibuffer "Regexp filter: ")))
   (let* ((cnt 0) ; count added events
 	 (org-agenda-new-buffers nil)
+	 (org-deadline-warning-days 0)
 	 (today (org-date-to-gregorian
 		 (time-to-days (current-time))))
 	 (files (org-agenda-files)) entries file)
@@ -18614,7 +18615,7 @@ belonging to the \"Work\" category."
       (setq entries
 	    (append entries
 		    (org-agenda-get-day-entries
-		     file today :timestamp :scheduled))))
+		     file today :timestamp :scheduled :deadline))))
     (setq entries (delq nil entries))
     ;; Map thru entries and find if we should filter them out
     (mapc