From 286f1abb87b05450a7c291f623e920cebfde0424 Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Mon, 10 Oct 2016 10:27:57 -0700
Subject: [PATCH] Use empty string instead of `undefined`.

---
 lodash.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lodash.js b/lodash.js
index e64f40137..0420c8149 100644
--- a/lodash.js
+++ b/lodash.js
@@ -6013,7 +6013,7 @@
       getTag = function(value) {
         var result = baseGetTag(value),
             Ctor = result == objectTag ? value.constructor : undefined,
-            ctorString = Ctor ? toSource(Ctor) : undefined;
+            ctorString = Ctor ? toSource(Ctor) : '';
 
         if (ctorString) {
           switch (ctorString) {