Pass through empty constructor names

lib/renderer/api/remote.js

@@ -60,7 +60,7 @@ var wrapArgs = function (args, visited) {
 
       ret = {
         type: 'object',
-        name: (value.constructor && value.constructor.name) ? value.constructor.name : 'Object',
+        name: value.constructor != null ? value.constructor.name : 'Object',
         members: []
       }
       for (prop in value) {

spec/api-ipc-spec.js

@@ -34,7 +34,8 @@ describe('ipc module', function () {
       assert.equal(a.foo.bar, 'baz')
       assert.equal(a.foo.baz, false)
       assert.equal(a.bar, 1234)
-      assert.equal(a.baz(Object.create(null)), 'hello')
+      assert.equal(a.getConstructorName(Object.create(null)), 'Object')
+      assert.equal(a.getConstructorName(new (class {})), '')
     })
 
     it('should search module from the user app', function () {

spec/fixtures/module/no-prototype.js

@@ -4,7 +4,7 @@ foo.baz = false
 module.exports = {
   foo: foo,
   bar: 1234,
-  baz: function () {
-    return 'hello'
+  getConstructorName: function (value) {
+    return value.constructor.name
   }
 }