bing logo https

fix syntax to please Travis

src/ol/source/bingmapssource.js

@@ -98,8 +98,8 @@ ol.source.BingMaps.prototype.handleImageryMetadataResponse =
   }
 
   var brandLogoUri = response.brandLogoUri;
-  if (ol.IS_HTTPS && brandLogoUri.indexOf("https")==-1){
-    brandLogoUri = brandLogoUri.replace("http", "https");
+  if (ol.IS_HTTPS && brandLogoUri.indexOf('https') == -1) {
+    brandLogoUri = brandLogoUri.replace('http', 'https');
   }
   //var copyright = response.copyright;  // FIXME do we need to display this?
   var resource = response.resourceSets[0].resources[0];