(custom-print-functions): Add defvar.

diff --git a/lisp/winner.el b/lisp/winner.el
index 15a86994c7b72104af6179d2267f0b018e6d2e88..dfc93a2a707527709bc8ab9e9f11dd5a6c3a3a58 100644 (file)
--- a/lisp/winner.el
+++ b/lisp/winner.el
@@ -169,6 +169,8 @@ With arg, turn Winner mode on if and only if arg is positive."
 
 (defvar winner-stacks nil) ; ------ " ------
 
+;; This works around a bug in defstruct.
+(defvar custom-print-functions nil)
 
 ;; A stack of window configurations with some additional information.
 (defstruct (winner-stack