Initializing unlocked property to false

Author: pavle-goloskokovic

src/sound/noaudio/NoAudioSoundManager.js

@@ -12,6 +12,7 @@ var NoAudioSoundManager = new Class({
         this.detune = 0;
         this.pauseOnBlur = true;
         this.locked = false;
+        this.unlocked = false;
     }
 });
 module.exports = NoAudioSoundManager;