SDL_mixer: mp3, mad: change audio stream src_format from AUDIO_S16 to AUDIO_S16SYS

SDL Commits
1 
From b7aa31c1daeb048fde27970a1e9190340948f222 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Fri, 26 Mar 2021 21:56:50 +0300
Subject: [PATCH] mp3, mad: change audio stream src_format from AUDIO_S16 to
 AUDIO_S16SYS

thanks to BeWorld2018 for testing
---
 src/codecs/music_mad.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/codecs/music_mad.c b/src/codecs/music_mad.c
index 1ab9f10..999a9e6 100644
--- a/src/codecs/music_mad.c
+++ b/src/codecs/music_mad.c
@@ -483,7 +483,7 @@ static SDL_bool decode_frame(MAD_Music *music)
         if (music->audiostream) {
             SDL_FreeAudioStream(music->audiostream);
         }
-        music->audiostream = SDL_NewAudioStream(AUDIO_S16, (Uint8)pcm->channels, (int)pcm->samplerate,
+        music->audiostream = SDL_NewAudioStream(AUDIO_S16SYS, (Uint8)pcm->channels, (int)pcm->samplerate,
                                                 music_spec.format, music_spec.channels, music_spec.freq);
         if (!music->audiostream) {
             return SDL_FALSE;