org-agenda: Fix agenda buffer name after reload sticky agenda

* lisp/org-agenda.el (org-agenda-list): Don't rename the buffer when
  redoing sticky.

This fix has been proposed by Ian Dunn.

<http://permalink.gmane.org/gmane.emacs.orgmode/112833>

TINYCHANGE

lisp/org-agenda.el

@@ -4201,6 +4201,7 @@ items if they have an hour specification like [h]h:mm."
   (catch 'exit
     (setq org-agenda-buffer-name
 	  (or org-agenda-buffer-tmp-name
+	      (and org-agenda-doing-sticky-redo org-agenda-buffer-name)
 	      (if org-agenda-sticky
 		  (cond ((and org-keys (stringp org-match))
 			 (format "*Org Agenda(%s:%s)*" org-keys org-match))