SDL_mixer: minor update to vendored wavpack.

From c7e9e1c87203df3f87e54de44d8e283ed0a65477 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Sun, 3 Mar 2024 03:01:10 +0300
Subject: [PATCH] minor update to vendored wavpack.

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

diff --git a/external/wavpack b/external/wavpack
index ef6c43ba..5af0b9be 160000
--- a/external/wavpack
+++ b/external/wavpack
@@ -1 +1 @@
-Subproject commit ef6c43ba9a37636d551d7a099e44a68dc61f7c47
+Subproject commit 5af0b9be5f164edbba04aeea627442ef0cd8f604