Merge pull request #4535 from ahocevar/osm-example-style

Do not use an array for a single style

examples/osm-vector-tiles.js

@@ -18,8 +18,7 @@ var roadColor = {
   'highway': '#f39'
 };
 var landuseStyleCache = {};
-var buildingStyle = [
-  new ol.style.Style({
+var buildingStyle = new ol.style.Style({
   fill: new ol.style.Fill({
     color: '#666',
     opacity: 0.4
@@ -28,8 +27,7 @@ var buildingStyle = [
     color: '#444',
     width: 1
   })
-  })
-];
+});
 
 var map = new ol.Map({
   layers: [