SDL: audio: Fixed audiostreams converting incorrect channel counts.

SDL Commits
1 
From 0e1669e296a147b31cb2635863d5f01e185bb589 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Tue, 9 May 2023 10:58:32 -0400
Subject: [PATCH] audio: Fixed audiostreams converting incorrect channel
 counts.

---
 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 47879c10abaa..c558288458b6 100644
--- a/src/audio/SDL_audiocvt.c
+++ b/src/audio/SDL_audiocvt.c
@@ -983,7 +983,7 @@ static int GetAudioStreamDataInternal(SDL_AudioStream *stream, void *buf, int le
                   resample_outbuf, output_frames);
 
     /* Get us to the final format! */
-    ConvertAudio(output_frames, resample_outbuf, SDL_AUDIO_F32, src_channels, buf, dst_format, dst_channels);
+    ConvertAudio(output_frames, resample_outbuf, SDL_AUDIO_F32, pre_resample_channels, buf, dst_format, dst_channels);
     return (int) (output_frames * dst_sample_frame_size);
 }