From 223cddc55ee86289b8d9367e9144e36e6e0acfb1 Mon Sep 17 00:00:00 2001
From: Rich Harris <richard.a.harris@gmail.com>
Date: Thu, 22 Oct 2015 17:49:49 -0400
Subject: [PATCH] default to options.external = []

---
 src/Bundle.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Bundle.js b/src/Bundle.js
index 037fe58..43e9242 100644
--- a/src/Bundle.js
+++ b/src/Bundle.js
@@ -47,7 +47,7 @@ export default class Bundle {
 
 		this.assumedGlobals = blank();
 
-		this.external = options.external;
+		this.external = options.external || [];
 		this.onwarn = options.onwarn || onwarn;
 
 		// TODO strictly speaking, this only applies with non-ES6, non-default-only bundles