update packages

lisp/notmuch/notmuch-show.el

@@ -864,7 +864,7 @@ will return nil if the CID is unknown or cannot be retrieved."
 		    (unless (icalendar-import-buffer file t)
 		      (error "Icalendar import error. %s"
 			     "See *icalendar-errors* for more information"))
-		    (set-buffer (get-file-buffer file))
+		    (set-buffer (find-buffer-visiting file))
 		    (setq result (buffer-substring (point-min) (point-max)))
 		    (set-buffer-modified-p nil)
 		    (kill-buffer (current-buffer)))
@@ -2686,7 +2686,9 @@ This function is used as a value for
 `imenu-prev-index-position-function'."
   (if (bobp)
       nil
-    (notmuch-show-previous-message)
+    (if (eobp)
+	(notmuch-show-move-to-message-top)
+      (notmuch-show-goto-message-previous))
     t))
 
 (defun notmuch-show-imenu-extract-index-name-function ()