From 18f4d846c993ae24abbdfadd85ddba23e1087709 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@musicpd.org>
Date: Thu, 29 Dec 2016 23:28:37 +0100
Subject: [PATCH] output/Internal: make the Mutex mutable

---
 src/output/Internal.hxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/output/Internal.hxx b/src/output/Internal.hxx
index 4973b0bee..a5b56edda 100644
--- a/src/output/Internal.hxx
+++ b/src/output/Internal.hxx
@@ -238,7 +238,7 @@ struct AudioOutput {
 	/**
 	 * This mutex protects #open, #fail_timer, #pipe.
 	 */
-	Mutex mutex;
+	mutable Mutex mutex;
 
 	/**
 	 * This condition object wakes up the output thread after