From e0846ced2d490a7c08ba909da3222037a815a198 Mon Sep 17 00:00:00 2001
From: danzel <danzel@localhost.geek.nz>
Date: Fri, 10 May 2013 09:35:55 +1200
Subject: [PATCH] Don't break if calling hasLayer with null. Fixes #170. Thanks
 @l0c0luke

---
 src/MarkerClusterGroup.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/MarkerClusterGroup.js b/src/MarkerClusterGroup.js
index 9f4ae759d..a46b1b752 100644
--- a/src/MarkerClusterGroup.js
+++ b/src/MarkerClusterGroup.js
@@ -261,7 +261,7 @@ L.MarkerClusterGroup = L.FeatureGroup.extend({
 
 	//Returns true if the given layer is in this MarkerClusterGroup
 	hasLayer: function (layer) {
-		if (layer._noHas) {
+		if (!layer || layer._noHas) {
 			return false;
 		}