Ignore undefined options in normalizeOptions

Ken Price · Ken Price · commit af73105ebe82 · 2015-11-13T16:48:02.000-07:00
diff --git a/lib/utils/normalize_options.js b/lib/utils/normalize_options.js
@@ -18,7 +18,9 @@ function normalizeOptions(options, Ctor) {
   var instance = new Ctor();
 
   Object.keys(options).forEach(function(key) {
-    instance[key] = options[key];
+    if (typeof options[key] !== "undefined") {
+      instance[key] = options[key];
+    }
   });
 
   return instance;
