PlayerControl: make settings "const"

src/PlayerControl.hxx

@@ -98,9 +98,9 @@ struct PlayerControl {
 
 	MultipleOutputs &outputs;
 
-	unsigned buffer_chunks;
+	const unsigned buffer_chunks;
 
-	unsigned int buffered_before_play;
+	const unsigned buffered_before_play;
 
 	/**
 	 * The handle of the player thread.

test/run_output.cxx

@@ -55,9 +55,11 @@ filter_plugin_by_name(gcc_unused const char *name)
 
 PlayerControl::PlayerControl(PlayerListener &_listener,
 			     MultipleOutputs &_outputs,
-			     gcc_unused unsigned _buffer_chunks,
-			     gcc_unused unsigned _buffered_before_play)
-	:listener(_listener), outputs(_outputs) {}
+			     unsigned _buffer_chunks,
+			     unsigned _buffered_before_play)
+	:listener(_listener), outputs(_outputs),
+	 buffer_chunks(_buffer_chunks),
+	 buffered_before_play(_buffered_before_play) {}
 PlayerControl::~PlayerControl() {}
 
 static AudioOutput *