(imenu-choose-buffer-index): Avoid trying to select WINDOW if it is nil.

diff --git a/lisp/imenu.el b/lisp/imenu.el
index 3fedade04e77249018ff5072b931c0657d63f282..715dcde3773a18016e18f63be93cb80cefdaf72b 100644 (file)
--- a/lisp/imenu.el
+++ b/lisp/imenu.el
@@ -966,7 +966,7 @@ The returned value is on the form (INDEX-NAME . INDEX-POSITION)."
     (and mouse-triggered
         (not (equal last-nonmenu-event '(menu-bar)))
         (let ((window (posn-window (event-start last-nonmenu-event))))
-          (or (framep window) (select-window window))))
+          (or (framep window) (null window) (select-window window))))
     ;; Create a list for this buffer only when needed.
     (while (eq result t)
       (setq index-alist (if alist alist (imenu--make-index-alist)))