SDL_mixer: test: Added copyright headers to all the source files.

From 9002148bee7a2ab4541fbe23e702e44ec6000ecb Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Thu, 5 Mar 2026 08:54:35 -0500
Subject: [PATCH] test: Added copyright headers to all the source files.

---
 test/testaudiodecoder.c   | 21 +++++++++++++++++++++
 test/testmixer.c          | 21 +++++++++++++++++++++
 test/testspatialization.c | 21 +++++++++++++++++++++
 3 files changed, 63 insertions(+)

diff --git a/test/testaudiodecoder.c b/test/testaudiodecoder.c
index 9f6365d5f..e5a2f70a9 100644
--- a/test/testaudiodecoder.c
+++ b/test/testaudiodecoder.c
@@ -1,3 +1,24 @@
+/*
+  SDL_mixer:  An audio mixer library based on the SDL library
+  Copyright (C) 1997-2026 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
 #define SDL_MAIN_USE_CALLBACKS 1  /* use the callbacks instead of main() */
 #include <SDL3/SDL.h>
 #include <SDL3/SDL_main.h>
diff --git a/test/testmixer.c b/test/testmixer.c
index 0f53fb22f..d1f7eff9c 100644
--- a/test/testmixer.c
+++ b/test/testmixer.c
@@ -1,3 +1,24 @@
+/*
+  SDL_mixer:  An audio mixer library based on the SDL library
+  Copyright (C) 1997-2026 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
 /*
   PLEASE NOTE THAT THE CODE IN THIS FILE IS ATROCIOUS, DON'T USE IT AS A
   FOUNDATION FOR YOUR OWN PROGRAMS.
diff --git a/test/testspatialization.c b/test/testspatialization.c
index c1235efc3..9b571bf11 100644
--- a/test/testspatialization.c
+++ b/test/testspatialization.c
@@ -1,3 +1,24 @@
+/*
+  SDL_mixer:  An audio mixer library based on the SDL library
+  Copyright (C) 1997-2026 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
 #define SDL_MAIN_USE_CALLBACKS 1  /* use the callbacks instead of main() */
 #include <SDL3/SDL.h>
 #include <SDL3/SDL_main.h>