rewrite replaygain code, needs testing

git-svn-id: https://svn.musicpd.org/mpd/trunk@2482 09075e82-0dd4-0310-85a5-a0d7c8717e4f

src/inputPlugins/audiofile_plugin.c

@@ -116,7 +116,8 @@ int audiofile_decode(OutputBuffer * cb, DecoderControl * dc, char * path) {
                                         ret*fs,
 					(float)current /
 					(float)dc->audioFormat.sampleRate,
-					bitRate);
+					bitRate,
+					NULL);
 				if(dc->stop) break;
 			}
 		}