SDL_mixer: cherry-picked a FLAC seek bug fix

From 88a85a6620de82d5e4eb91a7429ecd194b29ed38 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Thu, 7 Jul 2022 09:50:50 +0200
Subject: [PATCH] cherry-picked a FLAC seek bug fix

(noticed in debian.)
---
 external/flac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/external/flac b/external/flac
index 7283eed5..61d23045 160000
--- a/external/flac
+++ b/external/flac
@@ -1 +1 @@
-Subproject commit 7283eed5ea79635ba3f723175ef44c7ba3341463
+Subproject commit 61d230459643cc18cc1182374fde82fb76631f80