replay_gain_*.h: rename to *.hxx

src/filter/ReplayGainFilterPlugin.cxx

@@ -23,8 +23,8 @@
 #include "FilterInternal.hxx"
 #include "FilterRegistry.hxx"
 #include "AudioFormat.hxx"
-#include "replay_gain_info.h"
-#include "replay_gain_config.h"
+#include "ReplayGainInfo.hxx"
+#include "ReplayGainConfig.hxx"
 #include "MixerControl.hxx"
 #include "pcm/PcmVolume.hxx"
 #include "pcm/PcmBuffer.hxx"

src/filter/ReplayGainFilterPlugin.hxx

@@ -20,7 +20,7 @@
 #ifndef MPD_REPLAY_GAIN_FILTER_PLUGIN_HXX
 #define MPD_REPLAY_GAIN_FILTER_PLUGIN_HXX
 
-#include "replay_gain_info.h"
+#include "ReplayGainInfo.hxx"
 
 class Filter;
 class Mixer;