SDL_mixer: bump vendored opusfile (c3917)

From c3917a4a8075403bc5307a331b622f898f2bb461 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Sun, 21 Dec 2025 11:15:04 +0300
Subject: [PATCH] bump vendored opusfile

(cherry picked from commit ddaf5af8d73c8381f9ec98681c5cc56422497c3b)
---
 .gitmodules       | 2 +-
 external/opusfile | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/.gitmodules b/.gitmodules
index bbccdecd..c8e76614 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -17,7 +17,7 @@
 [submodule "external/opusfile"]
 	path = external/opusfile
 	url = https://github.com/libsdl-org/opusfile.git
-	branch = v0.12-SDL
+	branch = v0.13-git-SDL
 [submodule "external/tremor"]
 	path = external/tremor
 	url = https://github.com/libsdl-org/tremor.git
diff --git a/external/opusfile b/external/opusfile
index d820a66a..7d26ff56 160000
--- a/external/opusfile
+++ b/external/opusfile
@@ -1 +1 @@
-Subproject commit d820a66af7ba7fdda346b5b439baca9a2f04dd7f
+Subproject commit 7d26ff56278aa6cd7f2a5046498932e838f0ea3a