unset_sound_output should emit a specific type of changed().

diff --git a/src/lib/config.h b/src/lib/config.h
index 0695652fb1c73305c244137ad2be72645633f962..463eec47ed6d3f6a0f6bbf3893a1a27de6d75d32 100644 (file)
--- a/src/lib/config.h
+++ b/src/lib/config.h
@@ -916,7 +916,7 @@ public:
                }
 
                _sound_output = boost::none;
-               changed();
+               changed(SOUND_OUTPUT);
        }
 
        void set_last_player_load_directory (boost::filesystem::path d) {