Correct the texture format used for the N-Gage (#13192)

src/render/ngage/SDL_render_ngage.c

@@ -119,7 +119,7 @@ static bool NGAGE_CreateRenderer(SDL_Renderer *renderer, SDL_Window *window, SDL
     renderer->window = window;
     renderer->internal = phdata;
 
-    SDL_AddSupportedTextureFormat(renderer, SDL_PIXELFORMAT_ARGB4444);
+    SDL_AddSupportedTextureFormat(renderer, SDL_PIXELFORMAT_XRGB4444);
     SDL_SetNumberProperty(SDL_GetRendererProperties(renderer), SDL_PROP_RENDERER_MAX_TEXTURE_SIZE_NUMBER, 1024);
     SDL_SetHintWithPriority(SDL_HINT_RENDER_LINE_METHOD, "2", SDL_HINT_OVERRIDE);
 

src/video/ngage/SDL_ngagevideo.c

@@ -105,7 +105,7 @@ static bool NGAGE_VideoInit(SDL_VideoDevice *device)
     phdata->mode.w = 176;
     phdata->mode.h = 208;
     phdata->mode.refresh_rate = 60.0f;
-    phdata->mode.format = SDL_PIXELFORMAT_ARGB4444;
+    phdata->mode.format = SDL_PIXELFORMAT_XRGB4444;
 
     phdata->display.name = "N-Gage";
     phdata->display.desktop_mode = phdata->mode;