SDL_mixer: update vendored mpg123 for SIZEOF_OFF_T issues (38d60)

From 38d60f567cc1164d5508ae6114c41de796a04ddd Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Tue, 9 Dec 2025 03:25:56 +0300
Subject: [PATCH] update vendored mpg123 for SIZEOF_OFF_T issues

(cherry picked from commit 0610da571ce22c93ef7cdd11660e6edfa076faf3)
---
 external/mpg123 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/external/mpg123 b/external/mpg123
index 7c2c0d1e..e1938431 160000
--- a/external/mpg123
+++ b/external/mpg123
@@ -1 +1 @@
-Subproject commit 7c2c0d1e28b1844292bd6db313d8893d17722a82
+Subproject commit e1938431b1a9fcc62aadd67590efb6a6dabcaca3