* wl-summary.el (wl-summary-prefetch-msg): Fiexd. Call

* wl-summary.el (wl-summary-prefetch-msg): Fiexd. Call
`elmo-msgdb-overview-get-entity' with `msgdb' instead of
`(elmo-msgdb-get-overview msgdb)'.
(wl-summary-prefetch): Bind match data before call
`wl-summay-prefetch-msg'.
(wl-summary-goto-folder-subr): Call `wl-summary-toggle-disp-msg' with
'off if `wl-summary-buffer-disp-msg' is non-nil.
Fixed problem that couldn't show only one new or unread message when
enter folder.
(wl-summary-reply): Don't call `split-window-vertically' and other
window.