SDL: Fixed pixel format compatibility with SDL2

SDL Commits
1 
From a2d594269c9ddb0554a89ed0e652072bcc232d1b Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Mon, 7 Aug 2023 22:45:21 -0700
Subject: [PATCH] Fixed pixel format compatibility with SDL2

---
 include/SDL3/SDL_pixels.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/SDL3/SDL_pixels.h b/include/SDL3/SDL_pixels.h
index 7fc636be7a5e..6da0b93a8b13 100644
--- a/include/SDL3/SDL_pixels.h
+++ b/include/SDL3/SDL_pixels.h
@@ -91,6 +91,8 @@ typedef enum
 {
     SDL_ARRAYORDER_NONE,
     SDL_ARRAYORDER_RGB,
+    SDL_ARRAYORDER_UNUSED1, /* Left for compatibility with SDL2 */
+    SDL_ARRAYORDER_UNUSED2, /* Left for compatibility with SDL2 */
     SDL_ARRAYORDER_BGR
 } SDL_ArrayOrder;