From 3d76e4a3ccd7bea1668606846b9ad53ff7a4c826 Mon Sep 17 00:00:00 2001
From: atsuo yamada <yamada-git2@tir.jp>
Date: Sun, 14 Apr 2019 19:58:10 +0900
Subject: [PATCH] Cover exception by undefined _progressListener

---
 js/rpg_core/ProgressWatcher.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/js/rpg_core/ProgressWatcher.js b/js/rpg_core/ProgressWatcher.js
index aad5409f..8d9f64be 100644
--- a/js/rpg_core/ProgressWatcher.js
+++ b/js/rpg_core/ProgressWatcher.js
@@ -12,7 +12,7 @@ ProgressWatcher._bitmapListener = function(bitmap){
     this._countLoading++;
     bitmap.addLoadListener(function(){
         this._countLoaded++;
-        this._progressListener(this._countLoaded, this._countLoading);
+        this._progressListener && this._progressListener(this._countLoaded, this._countLoading);
     }.bind(this));
 };
 
@@ -20,7 +20,7 @@ ProgressWatcher._audioListener = function(audio){
     this._countLoading++;
     audio.addLoadListener(function(){
         this._countLoaded++;
-        this._progressListener(this._countLoaded, this._countLoading);
+        this._progressListener && this._progressListener(this._countLoaded, this._countLoading);
     }.bind(this));
 };