render: D3D12 Xbox buildfixes

src/render/direct3d12/SDL_render_d3d12.c

@@ -322,7 +322,7 @@ static SDL_PixelFormat D3D12_DXGIFormatToSDLPixelFormat(DXGI_FORMAT dxgiFormat)
     for (int i = 0; i < SDL_arraysize(dxgi_format_map); i++) {
         if (dxgi_format_map[i].unorm == dxgiFormat ||
             dxgi_format_map[i].srgb == dxgiFormat) {
-            return dxgi_format_map[i].sdl;
+            return (SDL_PixelFormat) dxgi_format_map[i].sdl;
         }
     }
     return SDL_PIXELFORMAT_UNKNOWN;
@@ -3547,7 +3547,7 @@ bool D3D12_CreateRenderer(SDL_Renderer *renderer, SDL_Window *window, SDL_Proper
 
         if ((unorm.Support1 & D3D12_FORMAT_SUPPORT1_TEXTURE2D) &&
             (srgb.Support1  & D3D12_FORMAT_SUPPORT1_TEXTURE2D)) {
-            SDL_AddSupportedTextureFormat(renderer, dxgi_format_map[i].sdl);
+            SDL_AddSupportedTextureFormat(renderer, (SDL_PixelFormat) dxgi_format_map[i].sdl);
         }
     }
     SDL_AddSupportedTextureFormat(renderer, SDL_PIXELFORMAT_INDEX8);