org-agenda.el (org-agenda-get-deadlines): Fix bug: use `org-agenda-show-inherited-tags'

* org-agenda.el (org-agenda-get-deadlines): Fix bug: use
`org-agenda-show-inherited-tags'.

Thanks to Kiwon Um for reporting this.

lisp/org-agenda.el

@@ -5892,7 +5892,7 @@ See also the user option `org-agenda-clock-consistency-checks'."
 	 (d1 (calendar-absolute-from-gregorian date))  ; DATE bound by calendar
 	 d2 diff dfrac wdays pos pos1 category category-pos
 	 tags suppress-prewarning ee txt head face s todo-state
-	 show-all upcomingp donep timestr warntime)
+	 show-all upcomingp donep timestr warntime inherited-tags)
     (goto-char (point-min))
     (while (re-search-forward regexp nil t)
       (setq suppress-prewarning nil)
@@ -5944,7 +5944,14 @@ See also the user option `org-agenda-clock-consistency-checks'."
 		    (setq txt org-agenda-no-heading-message)
 		  (goto-char (match-end 0))
 		  (setq pos1 (match-beginning 0))
-		  (setq tags (org-get-tags-at pos1 t))
+		  (setq inherited-tags
+			(or (eq org-agenda-show-inherited-tags 'always)
+			    (and (listp org-agenda-show-inherited-tags)
+				 (memq 'agenda org-agenda-show-inherited-tags))
+			    (and (eq org-agenda-show-inherited-tags t)
+				 (or (eq org-agenda-use-tag-inheritance t)
+				     (memq 'agenda org-agenda-use-tag-inheritance))))
+			tags (org-get-tags-at pos1 (not inherited-tags)))
 		  (setq head (buffer-substring-no-properties
 			      (point)
 			      (progn (skip-chars-forward "^\r\n")