From 0be05325e42762df5ca15da438edb1e3a62fea40 Mon Sep 17 00:00:00 2001
From: Book Pauk <bookpauk@gmail.com>
Date: Wed, 29 Jan 2020 01:02:05 +0700
Subject: [PATCH] =?UTF-8?q?=D0=98=D1=81=D0=BF=D1=80=D0=B0=D0=B2=D0=BB?=
 =?UTF-8?q?=D0=B5=D0=BD=20=D0=B1=D0=B0=D0=B3?=
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---
 server/core/Reader/BookConverter/ConvertBase.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/server/core/Reader/BookConverter/ConvertBase.js b/server/core/Reader/BookConverter/ConvertBase.js
index b2a5f712..0c21bd12 100644
--- a/server/core/Reader/BookConverter/ConvertBase.js
+++ b/server/core/Reader/BookConverter/ConvertBase.js
@@ -34,6 +34,8 @@ class ConvertBase {
     }
 
     async execConverter(path, args, onData, abort) {
+        onData = (onData ? onData : () => {});
+        
         let q = null;
         try {
             q = await queue.get(() => {onData();});