SDL_mixer: resolve -Wmissing-field-initializers warnings

SDL Commits
1 
From 143b0bbfd50654af667c87143c1a2d69ef80f151 Mon Sep 17 00:00:00 2001
From: Thomas Kuehne <[EMAIL REDACTED]>
Date: Sun, 12 Dec 2021 14:39:57 +0100
Subject: [PATCH] resolve -Wmissing-field-initializers warnings

fixes:
src/codecs/music_mpg123.c:66:1: warning: missing field 'mpg123_close' initializer [-Wmissing-field-initializers]
src/codecs/music_ogg.c:66:1: warning: missing field 'ov_clear' initializer [-Wmissing-field-initializers]
---
 src/codecs/music_mpg123.c | 6 +++++-
 src/codecs/music_ogg.c    | 5 ++++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/codecs/music_mpg123.c b/src/codecs/music_mpg123.c
index 43d11dc2..023bdef0 100644
--- a/src/codecs/music_mpg123.c
+++ b/src/codecs/music_mpg123.c
@@ -62,7 +62,11 @@ typedef struct {
 } mpg123_loader;
 
 static mpg123_loader mpg123 = {
-    0, NULL
+    0, NULL,
+    NULL, NULL, NULL, NULL, NULL,
+    NULL, NULL, NULL, NULL, NULL,
+    NULL, NULL, NULL, NULL, NULL,
+    NULL, NULL
 };
 
 #ifdef MPG123_DYNAMIC
diff --git a/src/codecs/music_ogg.c b/src/codecs/music_ogg.c
index 820f2b7e..80e46fb1 100644
--- a/src/codecs/music_ogg.c
+++ b/src/codecs/music_ogg.c
@@ -62,7 +62,10 @@ typedef struct {
 } vorbis_loader;
 
 static vorbis_loader vorbis = {
-    0, NULL
+    0, NULL,
+    NULL, NULL, NULL, NULL, NULL,
+    NULL, NULL, NULL, NULL, NULL,
+    NULL
 };
 
 #ifdef OGG_DYNAMIC