package/ffmpeg: fix build error

ffmpeg builds with `--enable-vaapi` opt made GCC v14 and 32 bit target
will throw an 'Wincompatible-pointer-types' error.

This is a downport of an upstreamed commit but not yet present in any
ffmpeg version that fix the pointer type.

Fixes:
 - http://autobuild.buildroot.org/results/f5f/f5f2d16226ad9500ecf046779d5282ee071a54d3/

Signed-off-by: Thomas Perale <thomas.perale@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 24fc2f9d177b897f0c204f2c6611e6a3ed306a3d)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/ffmpeg/0007-avutil-hwcontext-vaapi-use-the-correct-type.patch

@@ -0,0 +1,28 @@
+From 6f8e365a2af2b6b21701d41eed3b2e3f8a436eeb Mon Sep 17 00:00:00 2001
+From: James Almer <jamrial@gmail.com>
+Date: Wed, 31 Jul 2024 10:00:54 -0300
+Subject: [PATCH] avutil/hwcontext_vaapi: use the correct type for
+ VASurfaceAttribExternalBuffers.buffers
+
+Should fix ticket #11115.
+
+Signed-off-by: James Almer <jamrial@gmail.com>
+Upstream: https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/6f8e365a2af2b6b21701d41eed3b2e3f8a436eeb
+Signed-off-by: Thomas Perale <thomas.perale@mind.be>
+---
+ libavutil/hwcontext_vaapi.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/libavutil/hwcontext_vaapi.c b/libavutil/hwcontext_vaapi.c
+index 4cb25dd03212e..15fd84aa40679 100644
+--- a/libavutil/hwcontext_vaapi.c
++++ b/libavutil/hwcontext_vaapi.c
+@@ -1225,7 +1225,7 @@ static int vaapi_map_from_drm(AVHWFramesContext *src_fc, AVFrame *dst,
+ 
+     if (!use_prime2 || vas != VA_STATUS_SUCCESS) {
+         int k;
+-        unsigned long buffer_handle;
++        uintptr_t buffer_handle;
+         VASurfaceAttribExternalBuffers buffer_desc;
+         VASurfaceAttrib buffer_attrs[2] = {
+             {