ReplayGainInfo: move enum ReplayGainMode to separate header

Makefile.am

@@ -853,6 +853,7 @@ libbasic_a_SOURCES = \
 	src/CheckAudioFormat.cxx src/CheckAudioFormat.hxx \
 	src/AudioFormat.cxx src/AudioFormat.hxx \
 	src/AudioParser.cxx src/AudioParser.hxx \
+	src/ReplayGainMode.hxx \
 	src/ReplayGainInfo.cxx src/ReplayGainInfo.hxx
 
 # configuration library

src/ReplayGainConfig.hxx

@@ -21,7 +21,7 @@
 #define MPD_REPLAY_GAIN_CONFIG_HXX
 
 #include "check.h"
-#include "ReplayGainInfo.hxx"
+#include "ReplayGainMode.hxx"
 #include "Compiler.h"
 
 extern ReplayGainMode replay_gain_mode;

src/ReplayGainInfo.hxx

@@ -22,13 +22,7 @@
 
 #include "check.h"
 #include "Compiler.h"
-
-enum ReplayGainMode {
-	REPLAY_GAIN_AUTO = -2,
-	REPLAY_GAIN_OFF,
-	REPLAY_GAIN_ALBUM,
-	REPLAY_GAIN_TRACK,
-};
+#include "ReplayGainMode.hxx"
 
 struct ReplayGainTuple {
 	float gain;

src/ReplayGainMode.hxx

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2003-2016 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_REPLAY_GAIN_MODE_HXX
+#define MPD_REPLAY_GAIN_MODE_HXX
+
+enum ReplayGainMode {
+	REPLAY_GAIN_AUTO = -2,
+	REPLAY_GAIN_OFF,
+	REPLAY_GAIN_ALBUM,
+	REPLAY_GAIN_TRACK,
+};
+
+#endif

src/output/Internal.hxx

@@ -23,7 +23,7 @@
 #include "AudioFormat.hxx"
 #include "pcm/PcmBuffer.hxx"
 #include "pcm/PcmDither.hxx"
-#include "ReplayGainInfo.hxx"
+#include "ReplayGainMode.hxx"
 #include "filter/Observer.hxx"
 #include "thread/Mutex.hxx"
 #include "thread/Cond.hxx"

src/output/MultipleOutputs.hxx

@@ -27,7 +27,7 @@
 #define OUTPUT_ALL_H
 
 #include "AudioFormat.hxx"
-#include "ReplayGainInfo.hxx"
+#include "ReplayGainMode.hxx"
 #include "Chrono.hxx"
 #include "Compiler.h"