master 1625123: Fix eldoc usage of newly introduced variable

[Lars Ingebrigtsen]

branch: master
commit 1625123e4ceb8d23eef00f3944341ecf0a75dc77
Author: Greg Minshall <minshall@umich.edu>
Commit: Lars Ingebrigtsen <larsi@gnus.org>

    Fix eldoc usage of newly introduced variable
    
    * lisp/emacs-lisp/eldoc.el
    (eldoc-display-message-no-interference-p): Make this function work
    in older Emacs versions again (bug#51939).
---
 lisp/emacs-lisp/eldoc.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lisp/emacs-lisp/eldoc.el b/lisp/emacs-lisp/eldoc.el
index b30d3fc..cd0e7dc 100644
--- a/lisp/emacs-lisp/eldoc.el
+++ b/lisp/emacs-lisp/eldoc.el
@@ -385,7 +385,8 @@ Also store it in `eldoc-last-message' and return that 
value."
            ;; The following configuration shows "Matches..." in the
            ;; echo area when point is after a closing bracket, which
            ;; conflicts with eldoc.
-           (and show-paren-context-when-offscreen
+           (and (boundp 'show-paren-context-when-offscreen)
+                show-paren-context-when-offscreen
                 (not (pos-visible-in-window-p
                       (overlay-end show-paren--overlay)))))))