https://bugs.gentoo.org/903752
https://git.videolan.org/?p=ffmpeg.git;a=commit;h=cc76e8340d28438c1ac56ee7dfd774d25e944264

(Dropped second bit for vulkan.h as has changed significantly in >4.4.)

From cc76e8340d28438c1ac56ee7dfd774d25e944264 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Kacper=20Michaj=C5=82ow?= <kasper93@gmail.com>
Date: Thu, 2 Mar 2023 17:27:30 +0100
Subject: [PATCH] lavu/vulkan: fix handle type for 32-bit targets
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
Content-Transfer-Encoding: 8bit

Fixes compilation with clang which errors out on Wint-conversion.

Signed-off-by: Kacper Michajłow <kasper93@gmail.com>
Signed-off-by: Martin Storsjö <martin@martin.st>
--- a/libavutil/hwcontext_vulkan.c
+++ b/libavutil/hwcontext_vulkan.c
@@ -1149,7 +1149,7 @@ static void free_exec_ctx(AVHWFramesContext *hwfc, VulkanExecCtx *cmd)
 
     av_freep(&cmd->queues);
     av_freep(&cmd->bufs);
-    cmd->pool = NULL;
+    cmd->pool = VK_NULL_HANDLE;
 }
 
 static VkCommandBuffer get_buf_exec_ctx(AVHWFramesContext *hwfc, VulkanExecCtx *cmd)