org.el (org-entry-properties): Ensure the special property is not commented out when matched

* org.el (org-entry-properties): Ensure the special property
is not commented out when matched.

Other an agenda view like (tags "DEADLINE<\"<+0d>\"" ...) will
wrongly list an entry with a commented out DEADLINE line, because
org-agenda-skip only skip commented out stuff on the current line,
with is the headline itself when using "tags" agenda.

Thanks to Sébastien for reporting this.

lisp/org.el

@@ -15277,7 +15277,10 @@ things up because then unnecessary parsing is avoided."
 			     '("SCHEDULED" "DEADLINE" "CLOCK" "CLOSED"
 			       "TIMESTAMP" "TIMESTAMP_IA")))
 	     (catch 'match
-	       (while (re-search-forward org-maybe-keyword-time-regexp end t)
+	       (while (and (re-search-forward org-maybe-keyword-time-regexp end t)
+			   (not (text-property-any 0 (length (match-string 0))
+						   'face 'font-lock-comment-face
+						   (match-string 0))))
 		 (setq key (if (match-end 1)
 			       (substring (org-match-string-no-properties 1)
 					  0 -1))