From ead47deab7ed27f44a3e10a7b99d7235a4d53f39 Mon Sep 17 00:00:00 2001
From: Stefan Thomas <justmoon@members.fsf.org>
Date: Mon, 11 Mar 2013 14:17:57 +0100
Subject: [PATCH] JS: Fix Currency#is_valid.

Currency.is_valid("USD") returned false, because "USD" is NaN (not a Number).

We should not use NaN as a stand-in value, since it means "not a *JavaScript*
number", whereas our meaning really is "not a BigInteger object". So we should
be using null.
---
 src/js/currency.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/js/currency.js b/src/js/currency.js
index e4a4e305..ab960418 100644
--- a/src/js/currency.js
+++ b/src/js/currency.js
@@ -67,7 +67,7 @@ Currency.prototype.is_native = function () {
 };
 
 Currency.prototype.is_valid = function () {
-  return !isNaN(this._value);
+  return 'string' === typeof this._value || !isNaN(this._value);
 };
 
 Currency.prototype.to_json = function () {