SDL: GPU: fix swapchain buffer size not set on Xbox

SDL Commits
1 
From acb18e05b53638dae5995686f34e4845b29060f5 Mon Sep 17 00:00:00 2001
From: Daniel Ludwig <[EMAIL REDACTED]>
Date: Mon, 7 Oct 2024 19:53:06 +0200
Subject: [PATCH] GPU: fix swapchain buffer size not set on Xbox

---
 src/gpu/d3d12/SDL_gpu_d3d12.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/gpu/d3d12/SDL_gpu_d3d12.c b/src/gpu/d3d12/SDL_gpu_d3d12.c
index c85861c9c12a7..2e9ccf74e6fd3 100644
--- a/src/gpu/d3d12/SDL_gpu_d3d12.c
+++ b/src/gpu/d3d12/SDL_gpu_d3d12.c
@@ -6147,6 +6147,8 @@ static bool D3D12_INTERNAL_CreateSwapchain(
     windowData->swapchainComposition = swapchain_composition;
     windowData->swapchainColorSpace = DXGI_COLOR_SPACE_RGB_FULL_G22_NONE_P709;
     windowData->frameCounter = 0;
+    windowData->width = width;
+    windowData->height = height;
 
     // Precache blit pipelines for the swapchain format
     for (Uint32 i = 0; i < 5; i += 1) {