From 8f6b84d86c7313f6c897e334876d9ab31686261c Mon Sep 17 00:00:00 2001
From: The Tumultuous Unicorn Of Darkness
 <the-tumultuous-unicorn-of-darkness@gmx.com>
Date: Sun, 4 Aug 2024 14:59:52 +0200
Subject: [PATCH] Fix SEGFAULT in debugf() when using --quiet

The `--quiet` option calls `cpuid_set_warn_function(NULL)`, but debugf() was not checking if _warn_fun is defined unlike warnf()
---
 libcpuid/libcpuid_util.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libcpuid/libcpuid_util.c b/libcpuid/libcpuid_util.c
index c0dd0a5..5d2d366 100644
--- a/libcpuid/libcpuid_util.c
+++ b/libcpuid/libcpuid_util.c
@@ -73,7 +73,7 @@ void debugf(int verboselevel, const char* format, ...)
 {
 	char buff[1024];
 	va_list va;
-	if (verboselevel > _current_verboselevel) return;
+	if (!_warn_fun || (verboselevel > _current_verboselevel)) return;
 	va_start(va, format);
 	vsnprintf(buff, sizeof(buff), format, va);
 	va_end(va);