SDL_mixer: update vendored libgme (e7977)

From e797773b617bab0dcf00cb3762b1302dae9416f6 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Sun, 21 Jan 2024 03:28:50 +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 861c0c86..cdd02150 160000
--- a/external/libgme
+++ b/external/libgme
@@ -1 +1 @@
-Subproject commit 861c0c865696bb157039b2a6b48e5ae0548983be
+Subproject commit cdd021507518162a4884898bbac85cbd32ed7a77