From 10032f18faee4615cbb02e7bda705f392cc5b81f Mon Sep 17 00:00:00 2001
From: guybedford <guybedford@gmail.com>
Date: Thu, 9 Feb 2017 09:11:55 +0200
Subject: [PATCH] only call previous onerror if it exists

---
 src/common.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/common.js b/src/common.js
index 2d84c0ab..8b087150 100644
--- a/src/common.js
+++ b/src/common.js
@@ -147,7 +147,8 @@ if (isBrowser) {
       loadingScripts[i].err(msg);
       return;
     }
-    onerror.apply(this, arguments);
+    if (onerror)
+      onerror.apply(this, arguments);
   };
 }