* wl-summary.el (wl-summary-get-original-buffer): New function.

* wl-summary.el (wl-summary-get-original-buffer): New function.
(wl-summary-set-crosspost): Use it.
(wl-summary-target-mark-uudecode): Ditto.
(wl-summary-reedit): Ditto.
(wl-summary-resend-bounced-mail): Ditto.
(wl-summary-update-crosspost): Eliminated (It may be incorporated
into `elmo-folder-append-msgdb' method of elmo-nntp-folder class).

* wl-message.el (wl-message-buffer-display): Added argumnet `unread'.
(wl-message-display-internal): Ditto.

* elmo-mime.el (elmo-mime-message-display): Added argument `unread'.
 (elmo-mime-message-display-as-is): Ditto.