From de99228cd89feec02009aebb3eeac1f594b43ccf Mon Sep 17 00:00:00 2001
From: Eric Rosenbaum <eric.rosenbaum@gmail.com>
Date: Thu, 2 Feb 2017 15:25:36 -0500
Subject: [PATCH] check for own property in for (var _ in _ )

---
 src/index.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/index.js b/src/index.js
index 0bd8af5..4eddc04 100644
--- a/src/index.js
+++ b/src/index.js
@@ -178,7 +178,7 @@ function AudioPlayer (audioEngine) {
     this.clearEffects();
 
     // sound players that are currently playing, indexed by the sound's md5
-    this.activeSoundPlayers = Object.create(null);
+    this.activeSoundPlayers = {};
 }
 
 /**
@@ -209,8 +209,10 @@ AudioPlayer.prototype.playSound = function (md5) {
 
     // remove sounds that are not playing from the active sound players array
     for (var id in this.activeSoundPlayers) {
-        if (!this.activeSoundPlayers[id].isPlaying) {
-            delete this.activeSoundPlayers[id];
+        if (this.activeSoundPlayers.hasOwnProperty(id)) {
+            if (!this.activeSoundPlayers[id].isPlaying) {
+                delete this.activeSoundPlayers[id];
+            }
         }
     }