From 00fd4513a6cd6195655aec7297c974acb835d4a3 Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Mon, 18 Dec 2023 13:50:01 +0000
Subject:  and one more

Signed-off-by: Laurent Bercot <ska@appnovation.com>
---
 src/libstddjb/byte_chr.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/libstddjb/byte_chr.c b/src/libstddjb/byte_chr.c
index ba774aa..8203433 100644
--- a/src/libstddjb/byte_chr.c
+++ b/src/libstddjb/byte_chr.c
@@ -5,6 +5,8 @@
 
 size_t byte_chr (char const *s, size_t n, int c)
 {
-  void *p = memchr(s, c, n) ;
+  void *p ;
+  if (!n) return 0 ;
+  p = memchr(s, c, n) ;
   return p ? (char *)p - s : n ;
 }
-- 
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