Added touchUnlocked property to HTML5AudioSoundManager class

Author: pavle-goloskokovic

src/sound/html5/HTML5AudioSoundManager.js

@@ -54,6 +54,15 @@ var HTML5AudioSoundManager = new Class({
          * @property {boolean} touchLocked
          */
         this.touchLocked = 'ontouchstart' in window;
+        /**
+         * Flag used for indicating when the audio has been unlocked,
+         * if there ever was a need for it.
+         *
+         * @private
+         * @type {boolean}
+         * @default false
+         */
+        this.touchUnlocked = false;
         /**
          * Property that actually holds the value of global mute
          * for HTML5 Audio sound manager implementation.