SDL: Add a missing int cast

SDL Commits
1 
From 0c15ce0060df56d3525d74be66f9766f66f7d838 Mon Sep 17 00:00:00 2001
From: Brick <[EMAIL REDACTED]>
Date: Wed, 23 Aug 2023 19:32:53 +0100
Subject: [PATCH] Add a missing int cast

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

diff --git a/src/audio/SDL_audiocvt.c b/src/audio/SDL_audiocvt.c
index f71290a82618..e2549d6054a1 100644
--- a/src/audio/SDL_audiocvt.c
+++ b/src/audio/SDL_audiocvt.c
@@ -942,7 +942,7 @@ static int GetAudioStreamDataInternal(SDL_AudioStream *stream, void *buf, int le
         return output_bytes;
     }
 
-    int work_buffer_frames = (work_buffer_tail - work_buffer) / src_sample_frame_size;
+    int work_buffer_frames = (int)(work_buffer_tail - work_buffer) / src_sample_frame_size;
     SDL_assert(work_buffer_frames == input_frames + (resampler_padding_frames * 2));
 
     // Resampling! get the work buffer to float32 format, etc, in-place.