From ce884169b68ed8f00dd3691169447765a7c38a13 Mon Sep 17 00:00:00 2001
From: Dan Kohn <dan@shopbeam.com>
Date: Thu, 27 Mar 2014 01:13:03 -0400
Subject: [PATCH] Convert undefined files to empty string

---
 tools/node.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/node.js b/tools/node.js
index bef296ea..4c8c4fe9 100644
--- a/tools/node.js
+++ b/tools/node.js
@@ -70,6 +70,8 @@ exports.minify = function(files, options) {
     if (options.spidermonkey) {
         toplevel = UglifyJS.AST_Node.from_mozilla_ast(files);
     } else {
+        if (typeof files == "undefined")
+            {files = ""};
         if (typeof files == "string")
             files = [ files ];
         files.forEach(function(file){