SDL_mixer: fix -Wsign-compare

SDL Commits
1 
From e3b54495d746c07713b57179a1916180d26f5a22 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Tue, 3 Mar 2026 00:39:10 +0300
Subject: [PATCH] fix -Wsign-compare

---
 src/decoder_wav.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/decoder_wav.c b/src/decoder_wav.c
index 2a0c2ea5..ace3345d 100644
--- a/src/decoder_wav.c
+++ b/src/decoder_wav.c
@@ -1494,7 +1494,7 @@ static void SetAudioStreamChannelMapForWav(SDL_AudioStream *stream, int channels
     }
 
     int chmap[32];
-    channels = SDL_min(channels, SDL_arraysize(chmap));
+    channels = SDL_min(channels, (int)SDL_arraysize(chmap));
 
     int current_channel = 0;
     for (int i = 0; i < 32; i++) {