src: fix useless call in permission.cc

FromMaybe() has no side effects and the return value is ignored. Use
Check() instead to ensure that the operation succeeded.

Author: tniessen

src/permission/permission.cc

@@ -143,15 +143,15 @@ void Permission::ThrowAccessDenied(Environment* env,
                                     PermissionToString(perm),
                                     v8::NewStringType::kNormal)
                 .ToLocalChecked())
-      .FromMaybe(false);
+      .Check();
   err.As<Object>()
       ->Set(env->context(),
             env->resource_string(),
             v8::String::NewFromUtf8(env->isolate(),
                                     std::string(res).c_str(),
                                     v8::NewStringType::kNormal)
                 .ToLocalChecked())
-      .FromMaybe(false);
+      .Check();
   env->isolate()->ThrowException(err);
 }