From 5c348fd6bdcbc0d21d47954a357c150809dabe0c Mon Sep 17 00:00:00 2001
From: Veselin Georgiev <anrieff@gmail.com>
Date: Tue, 18 Nov 2008 22:39:14 +0000
Subject: [PATCH] Using set_warn_function() with NULL crashes if warning were
 to be emitted. Fixed

git-svn-id: https://svn.code.sf.net/p/libcpuid/code/HEAD/libcpuid@18 3b4be424-7ac5-41d7-8526-f4ddcb85d872
---
 libcpuid/libcpuid_util.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libcpuid/libcpuid_util.c b/libcpuid/libcpuid_util.c
index 44dc9a9..dc3e4b2 100644
--- a/libcpuid/libcpuid_util.c
+++ b/libcpuid/libcpuid_util.c
@@ -48,6 +48,7 @@ libcpuid_warn_fn_t _warn_fun = default_warn;
 
 void warnf(const char* format, ...)
 {
+	if (!_warn_fun) return;
 	char buff[1024];
 	va_list va;
 	va_start(va, format);