SDL_mixer: music_flac.c: fix after preprocessor macro change with dr_flac commit.

SDL Commits
1 
From f2a40a1933bcda3d04755e94b00d9827ce6cd213 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Sat, 21 May 2022 12:20:20 +0300
Subject: [PATCH] music_flac.c: fix after preprocessor macro change with
 dr_flac commit.

---
 src/codecs/music_flac.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/codecs/music_flac.c b/src/codecs/music_flac.c
index b9dbc51d..2e19d807 100644
--- a/src/codecs/music_flac.c
+++ b/src/codecs/music_flac.c
@@ -22,7 +22,7 @@
     ~ Austen Dicken (admin@cvpcs.org)
 */
 
-#ifdef MUSIC_FLAC
+#ifdef MUSIC_FLAC_LIBFLAC
 
 #include "SDL_loadso.h"
 #include "SDL_assert.h"
@@ -757,6 +757,6 @@ Mix_MusicInterface Mix_MusicInterface_FLAC =
     FLAC_Unload
 };
 
-#endif /* MUSIC_FLAC */
+#endif /* MUSIC_FLAC_LIBFLAC */
 
 /* vi: set ts=4 sw=4 expandtab: */