From a9af9724f1a9411c019d21e758ca1ac3e41b1060 Mon Sep 17 00:00:00 2001
From: Kogis IWI <olivier.terral@swisstopo.ch>
Date: Thu, 24 Aug 2017 13:49:55 +0200
Subject: [PATCH] Manage null value of prims variable

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

diff --git a/src/featureconverter.js b/src/featureconverter.js
index a235749f8..b7166ae59 100644
--- a/src/featureconverter.js
+++ b/src/featureconverter.js
@@ -1025,7 +1025,7 @@ olcs.FeatureConverter.prototype.olVectorLayerToCesium = function(olLayer, olView
       if (prims) {
         if (!primitives) {
           primitives = prims;
-        } else {
+        } else if (prims) {
           let i = 0, prim;
           while ((prim = prims.get(i))) {
             primitives.add(prim);