Add autoload cookie for xref-marker-stack-empty-p (Bug#19554).

* progmodes/xref.el (xref-marker-stack-empty-p): Add autoload
cookie (Bug#19554).

lisp/ChangeLog

 2015-01-12  Martin Rudalics  <rudalics@gmx.at>
 
+	* progmodes/xref.el (xref-marker-stack-empty-p): Add autoload
+	cookie (Bug#19554).
+
 	* frame.el (frame-notice-user-settings): Remove code dealing with
 	frame-initial-frame-tool-bar-height.  Turn off `tool-bar-mode'
 	only if `window-system-frame-alist' or `default-frame-alist' ask

lisp/progmodes/xref.el

@@ -301,6 +301,7 @@ backward."
       (let ((marker (ring-remove ring)))
         (set-marker marker nil nil)))))
 
+;;;###autoload
 (defun xref-marker-stack-empty-p ()
   "Return t if the marker stack is empty; nil otherwise."
   (ring-empty-p xref--marker-ring))