From 12db2e6c51dd8ca22ecd91e24af070f39fc14949 Mon Sep 17 00:00:00 2001
From: Aurimas Vinckevicius <aurimas.dev@gmail.com>
Date: Tue, 10 Mar 2015 22:43:13 -0500
Subject: [PATCH] Don't throw if checking invalid field in
 ItemFields.isValidForType

---
 chrome/content/zotero/xpcom/data/itemFields.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/chrome/content/zotero/xpcom/data/itemFields.js b/chrome/content/zotero/xpcom/data/itemFields.js
index a2f4e5621..e322be874 100644
--- a/chrome/content/zotero/xpcom/data/itemFields.js
+++ b/chrome/content/zotero/xpcom/data/itemFields.js
@@ -130,7 +130,8 @@ Zotero.ItemFields = new function() {
 	
 	
 	function isValidForType(fieldID, itemTypeID) {
-		_fieldCheck(fieldID, 'isValidForType');
+		fieldID = getID(fieldID);
+		if (!fieldID) return false;
 		
 		if (!_fields[fieldID]['itemTypes']) {
 			return false;