emacs-29 48604565847: Fix 'makefile-browser-client' variable initialization

[Eli Zaretskii]

branch: emacs-29
commit 486045658470db838c58b9755f831d65f8593907
Author: Christoph Göttschkes <just.mychris@googlemail.com>
Commit: Eli Zaretskii <eliz@gnu.org>

    Fix 'makefile-browser-client' variable initialization
    
    * lisp/progmodes/make-mode.el (makefile-browser-client):
    Initialize to nil.  (Bug#65487)
    
    Copyright-paperwork-exempt: yes
---
 lisp/progmodes/make-mode.el | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lisp/progmodes/make-mode.el b/lisp/progmodes/make-mode.el
index 087974bd1f0..a1fdfecbec2 100644
--- a/lisp/progmodes/make-mode.el
+++ b/lisp/progmodes/make-mode.el
@@ -695,7 +695,7 @@ The function must satisfy this calling convention:
   "Table of all macro names known for this buffer.")
 (put 'makefile-macro-table 'risky-local-variable t)
 
-(defvar makefile-browser-client
+(defvar makefile-browser-client nil
   "A buffer in Makefile mode that is currently using the browser.")
 
 (defvar makefile-browser-selection-vector nil)