org.el: Prevent an error when trying to fontify beyond (point-max).

* org.el (org-fontify-meta-lines-and-blocks-1): Prevent an
error when trying to fontify beyond (point-max).

TINYCHANGE

Thanks to Leo and Henning for reporting this, and to Nick Dokos
for providing the fix.

lisp/org.el

@@ -5475,7 +5475,7 @@ will be prompted for."
 	   ((not (member (char-after beg) '(?\  ?\t)))
 	    ;; just any other in-buffer setting, but not indented
 	    (add-text-properties
-	     beg (1+ (match-end 0))
+	     beg (match-end 0)
 	     '(font-lock-fontified t face org-meta-line))
 	    t)
 	   ((or (member dc1 '("begin:" "end:" "caption:" "label:"