From e7b47ce3359e1a51e481defba3294f78042c4c25 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@musicpd.org>
Date: Thu, 26 Oct 2017 08:17:21 +0200
Subject: [PATCH] output/alsa: in_frame_size is a debug-only variable

---
 src/output/plugins/AlsaOutputPlugin.cxx | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/output/plugins/AlsaOutputPlugin.cxx b/src/output/plugins/AlsaOutputPlugin.cxx
index 60c738466..8df6e0f79 100644
--- a/src/output/plugins/AlsaOutputPlugin.cxx
+++ b/src/output/plugins/AlsaOutputPlugin.cxx
@@ -90,10 +90,12 @@ class AlsaOutput final
 	/** the libasound PCM device handle */
 	snd_pcm_t *pcm;
 
+#ifndef NDEBUG
 	/**
 	 * The size of one audio frame passed to method play().
 	 */
 	size_t in_frame_size;
+#endif
 
 	/**
 	 * The size of one audio frame passed to libasound.
@@ -1044,7 +1046,9 @@ AlsaOutput::Open(AudioFormat &audio_format)
 			 audio_format.channels,
 			 params);
 
+#ifndef NDEBUG
 	in_frame_size = audio_format.GetFrameSize();
+#endif
 	out_frame_size = pcm_export->GetFrameSize(audio_format);
 
 	drain = false;