Fix 'makefile-browser-client' variable initialization

* lisp/progmodes/make-mode.el (makefile-browser-client):
Initialize to nil.  (Bug#65487)

Copyright-paperwork-exempt: yes

diff --git a/lisp/progmodes/make-mode.el b/lisp/progmodes/make-mode.el
index 087974bd1f002568eb5f623521fddb39f0b0ec2f..a1fdfecbec28750dbd6675a282ac910317564693 100644 (file)
--- 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)