From f32b8e31a224e8f6281db4fde0a480a1b091d9f0 Mon Sep 17 00:00:00 2001
From: "pcw@pcw-PC.shout.local" <unknown@kiln.example.com>
Date: Mon, 14 Jan 2013 21:20:34 +0000
Subject: [PATCH] Added null check just in case

---
 src/Umbraco.Web/HtmlHelperRenderExtensions.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Umbraco.Web/HtmlHelperRenderExtensions.cs b/src/Umbraco.Web/HtmlHelperRenderExtensions.cs
index 0c8a529ea1..cec5267497 100644
--- a/src/Umbraco.Web/HtmlHelperRenderExtensions.cs
+++ b/src/Umbraco.Web/HtmlHelperRenderExtensions.cs
@@ -112,7 +112,7 @@ namespace Umbraco.Web
 														  viewContext.HttpContext.Server.UrlEncode(surfaceAction),
 														  area);
 
-				var additionalRouteValsAsQuery = additionalRouteVals.ToDictionary<object>().ToQueryString();
+				var additionalRouteValsAsQuery = additionalRouteVals != null ? additionalRouteVals.ToDictionary<object>().ToQueryString() : null;
 
 				if (!additionalRouteValsAsQuery.IsNullOrWhiteSpace())
 					surfaceRouteParams += "&" + additionalRouteValsAsQuery;