Don't use summary window to visit group buffer (bugfix)

* lisp/gnus/gnus-sum.el (gnus-summary-jump-to-group): Make sure that
the window to open the group buffer doesn't visit the summary buffer.
This fixes a bug: `gnus-summary-next-article' sometimes causes an error
by trying to select nonexistent summary window.

diff --git a/lisp/gnus/gnus-sum.el b/lisp/gnus/gnus-sum.el
index f2e51fb225f830914c9606f2b704fc1d0ffcd9c9..025969296712671372fa286b7a369e83bc9c6407 100644 (file)
--- a/lisp/gnus/gnus-sum.el
+++ b/lisp/gnus/gnus-sum.el
@@ -6931,7 +6931,7 @@ displayed, no centering will be performed."
     (save-excursion
       ;; Take care of tree window mode.
       (if (get-buffer-window gnus-group-buffer 0)
-         (pop-to-buffer gnus-group-buffer)
+         (pop-to-buffer gnus-group-buffer t)
        (set-buffer gnus-group-buffer))
       (gnus-group-jump-to-group newsgroup))))