SDL_mixer: update vendored libgme (8ab0d)

From 8ab0d03dc4eb1de59fa9a84c1d92e4fbd8fd6757 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Fri, 3 Nov 2023 01:50:02 +0300
Subject: [PATCH] update vendored libgme

---
 external/libgme | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/external/libgme b/external/libgme
index bc33b2db..de51098d 160000
--- a/external/libgme
+++ b/external/libgme
@@ -1 +1 @@
-Subproject commit bc33b2db979da6c50476f4b1c42c7201ba535e78
+Subproject commit de51098d0cd7d193fab880aa736e9b6a6561fd56