From 7897b0beedc822129f7e8e429995f9b6b3860d74 Mon Sep 17 00:00:00 2001
From: eaphone <cyfdel@hotmail.com>
Date: Wed, 7 Aug 2024 23:58:07 +0800
Subject: [PATCH] libavdevice/gdigrab: change hwnd tail check fail logic to
 !=null

Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
---
 libavdevice/gdigrab.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavdevice/gdigrab.c b/libavdevice/gdigrab.c
index c91661c556..08a41c304b 100644
--- a/libavdevice/gdigrab.c
+++ b/libavdevice/gdigrab.c
@@ -281,7 +281,7 @@ gdigrab_read_header(AVFormatContext *s1)
 
         hwnd = (HWND) strtoull(name, &p, 0);
 
-        if (p == NULL || p == name || p[0] == '\0')
+        if (p == NULL || p == name || p[0] != '\0')
         {
             av_log(s1, AV_LOG_ERROR,
                    "Invalid window handle '%s', must be a valid integer.\n", name);