From c39ca701d3ffa3a7fcb987170436ad441e8f8ad6 Mon Sep 17 00:00:00 2001
From: Eli Zaretskii <eliz@gnu.org>
Date: Tue, 28 Aug 2018 19:36:02 +0300
Subject: [PATCH] Fix a recent change

* src/dispnew.c (sit_for): Don;t treat nil as zero.  Reported
by Glenn Morris <rgm@gnu.org>.
---
 src/dispnew.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/dispnew.c b/src/dispnew.c
index 97c6a446a6b..61ca717079b 100644
--- a/src/dispnew.c
+++ b/src/dispnew.c
@@ -5775,7 +5775,7 @@ sit_for (Lisp_Object timeout, bool reading, int display_option)
     }
   else if (BIGNUMP (timeout))
     {
-      if (!Fnatnump (timeout))
+      if (NILP (Fnatnump (timeout)))
 	return Qt;
       sec = bignum_to_intmax (timeout);
       if (sec == 0)
-- 
2.39.5