SDL: Fix C23 empty initializer warning.

SDL Commits
1 
From 5f25691c856ca53eae322ef8bcfd8b8cbe574989 Mon Sep 17 00:00:00 2001
From: Petar Popovic <[EMAIL REDACTED]>
Date: Mon, 30 Dec 2024 01:39:39 +0100
Subject: [PATCH] Fix C23 empty initializer warning.

---
 src/audio/alsa/SDL_alsa_audio.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/audio/alsa/SDL_alsa_audio.c b/src/audio/alsa/SDL_alsa_audio.c
index 2b1c12cbf3cc0..3bceb8e6ef070 100644
--- a/src/audio/alsa/SDL_alsa_audio.c
+++ b/src/audio/alsa/SDL_alsa_audio.c
@@ -497,6 +497,7 @@ struct ALSA_pcm_cfg_ctx {
 static enum snd_pcm_chmap_position sdl_channel_maps[SDL_AUDIO_ALSA__SDL_CHMAPS_N][SDL_AUDIO_ALSA__CHMAP_CHANS_N_MAX] = {
     // 0 channels
     {
+        0
     },
     // 1 channel
     {