SDL: Sync SDL2 wiki -> header (01314)

From 01314ff1d4fbf0ed512ead31701e550f9cfeb73f Mon Sep 17 00:00:00 2001
From: SDL Wiki Bot <[EMAIL REDACTED]>
Date: Tue, 21 May 2024 20:45:35 +0000
Subject: [PATCH] Sync SDL2 wiki -> header

---
 include/SDL_audio.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/SDL_audio.h b/include/SDL_audio.h
index e09a37554f29f..936b78aa640e5 100644
--- a/include/SDL_audio.h
+++ b/include/SDL_audio.h
@@ -154,6 +154,7 @@ typedef Uint16 SDL_AudioFormat;
  * \param userdata An application-specific parameter saved in the
  *                 SDL_AudioSpec structure
  * \param stream A pointer to the audio data buffer.
+ * \param len Length of **stream** in bytes.
  */
 typedef void (SDLCALL * SDL_AudioCallback) (void *userdata, Uint8 * stream,
                                             int len);