Use lexical-binding in mwheel.el

diff --git a/lisp/mwheel.el b/lisp/mwheel.el
index 3775eefc4f36269a37cfe5f6b4b71b2d623a18da..3b93bd1d5e4ece4208281a46fb2e948b1cc0620c 100644 (file)
--- a/lisp/mwheel.el
+++ b/lisp/mwheel.el
@@ -1,4 +1,4 @@
-;;; mwheel.el --- Wheel mouse support
+;;; mwheel.el --- Mouse wheel support  -*- lexical-binding:t -*-
 
 ;; Copyright (C) 1998, 2000-2020 Free Software Foundation, Inc.
 ;; Keywords: mouse