From bb7a922f84354b65f2c146a197f8091dbea18238 Mon Sep 17 00:00:00 2001
From: Benny Baumann <BenBE@geshi.org>
Date: Tue, 13 Aug 2024 09:28:43 +0200
Subject: [PATCH] Check for non-zero buffer size in xSnprintf

---
 XUtils.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/XUtils.c b/XUtils.c
index aa9cc9e4a..94a14df64 100644
--- a/XUtils.c
+++ b/XUtils.c
@@ -238,6 +238,8 @@ int xAsprintf(char** strp, const char* fmt, ...) {
 }
 
 int xSnprintf(char* buf, size_t len, const char* fmt, ...) {
+   assert(len > 0);
+
    va_list vl;
    va_start(vl, fmt);
    int n = vsnprintf(buf, len, fmt, vl);