From 7ad3a46d76a19e41172eecbf264707bdbf7c0db4 Mon Sep 17 00:00:00 2001
From: Philipp Wiesemann <philipp.wiesemann@arcor.de>
Date: Sat, 5 Nov 2016 21:23:17 +0100
Subject: [PATCH] ALSA: Fixed compile warning about unused function.

Found by buildbot.
---
 src/audio/alsa/SDL_alsa_audio.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/audio/alsa/SDL_alsa_audio.c b/src/audio/alsa/SDL_alsa_audio.c
index 05c8862a7..149572ed2 100644
--- a/src/audio/alsa/SDL_alsa_audio.c
+++ b/src/audio/alsa/SDL_alsa_audio.c
@@ -310,12 +310,14 @@ swizzle_alsa_channels(_THIS, void *buffer, Uint32 bufferlen)
     /* !!! FIXME: update this for 7.1 if needed, later. */
 }
 
+#ifdef SND_CHMAP_API_VERSION
 /* Some devices have the right channel map, no swizzling necessary */
 static void
 no_swizzle(_THIS, void *buffer, Uint32 bufferlen)
 {
     return;
 }
+#endif /* SND_CHMAP_API_VERSION */
 
 
 static void