Initializing rate property to 0

Author: pavle-goloskokovic

src/sound/noaudio/NoAudioSoundManager.js

@@ -9,6 +9,7 @@ var NoAudioSoundManager = new Class({
         this.mute = false;
         this.volume = 1;
         this.rate = 1;
+        this.detune = 0;
     }
 });
 module.exports = NoAudioSoundManager;