SDL_mixer: fixed build after commit af783153

SDL Commits
1 
From a7dc9ef35233c4579ef66535fc08625ec226b66c Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Sat, 28 May 2022 02:37:50 +0300
Subject: [PATCH] fixed build after commit af783153

---
 src/music.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/music.c b/src/music.c
index e0c1e918..fa6d73ed 100644
--- a/src/music.c
+++ b/src/music.c
@@ -38,7 +38,6 @@
 #include "music_opus.h"
 #include "music_drmp3.h"
 #include "music_mpg123.h"
-#include "music_mad.h"
 #include "music_drflac.h"
 #include "music_flac.h"
 #include "native_midi/native_midi.h"
@@ -94,7 +93,7 @@ void meta_tags_init(Mix_MusicMetaTags *tags)
 void meta_tags_clear(Mix_MusicMetaTags *tags)
 {
     size_t i = 0;
-    for (i = 0; i < MIX_META_LAST; i++) {
+    for ( ; i < MIX_META_LAST; i++) {
         if (tags->tags[i]) {
             SDL_free(tags->tags[i]);
             tags->tags[i] = NULL;