bug extend

gistfile1.js

var def = {
   l10n:
    { langdetectDataPath: '/usr/share/yandex/lang_detect_data.txt',
      'default': 'ru',
      langParamName: 'lang',
      localeParamName: 'locale',
      currencyParamName: 'currency',
      rewriteRegionIfNotInLocaleCountry: false,
      decl:
       { ru:
          { defaultRegionId: 213,
            defaultCountryId: 225,
            langs: [ 'ru', 'uk', 'en' ],
            currencies: [ 'RUR', 'USD', 'EUR', 'UAH', 'BYR', 'KZT' ] } } }
    },

   client = {
   l10n:
    { rewriteRegionIfNotInLocaleCountry: true,
      'default': 'ru',
      decl:
       { ru:
          { id: 'ru',
            defaultRegionId: 213,
            defaultCountryId: 227,
            langs: [ 'ru' ],
            currencies: [ 'RUR', 'USD', 'EUR' ] } } } };

var util = require('nodules-libs').util;

console.log('default', def.l10n.decl.ru);
console.log('clinet', client.l10n.decl.ru);
console.log('result', util.extend(true, {}, def, client).l10n.decl.ru);