audio: Headers said 5 channel is quad+center, but it's 4.1.
diff --git a/include/SDL_audio.h b/include/SDL_audio.h
index 11d1a35..c42de3e 100644
--- a/include/SDL_audio.h
+++ b/include/SDL_audio.h
@@ -172,7 +172,7 @@ typedef void (SDLCALL * SDL_AudioCallback) (void *userdata, Uint8 * stream,
* 2: FL FR (stereo)
* 3: FL FR LFE (2.1 surround)
* 4: FL FR BL BR (quad)
- * 5: FL FR FC BL BR (quad + center)
+ * 5: FL FR LFE BL BR (4.1 surround)
* 6: FL FR FC LFE SL SR (5.1 surround - last two can also be BL BR)
* 7: FL FR FC LFE BC SL SR (6.1 surround)
* 8: FL FR FC LFE BL BR SL SR (7.1 surround)