Errors when using the global namespace

[cmfcmf]

This file produces erros when running translation:extract:

<?php
/**
 * Copyright Zikula Foundation 2009 - Zikula Application Framework
 *
 * This work is contributed to the Zikula Foundation under one or more
 * Contributor Agreements and licensed to You under the following license:
 *
 * @license GNU/LGPLv3 (or at your option, any later version).
 *
 * Please see the NOTICE file distributed with this source code for further
 * information regarding copyright and licensing.
 */

namespace Zikula\Module\UsersModule {
    use Zikula\Bundle\CoreBundle\Bundle\AbstractCoreModule;

    /**
     * Base module definition for the users module
     */
    class ZikulaUsersModule extends AbstractCoreModule
    {
    }
}

/**
 * BC layer till for <=1.4.0
 */
namespace {
    /**
     * constants for the users module
     *
     * @deprecated since 1.4.0 use Zikula\Module\UsersModule\Constant instead
     */
    class Users_Constant extends Zikula\Module\UsersModule\Constant
    {
    }

    /**
     * authentication method helper
     *
     * @deprecated since 1.4.0 use \Zikula\Module\UsersModule\Helper\AuthenticationMethodHelper instead
     */
    class Users_Helper_AuthenticationMethod extends \Zikula\Module\UsersModule\Helper\AuthenticationMethodHelper
    {
    }

    /**
     * list authentication helpers
     *
     * @deprecated since 1.4.0 use \Zikula\Module\UsersModule\Helper\AuthenticationMethodListHelper instead
     */
    class Users_Helper_AuthenticationMethodList extends \Zikula\Module\UsersModule\Helper\AuthenticationMethodListHelper
    {
    }

    /**
     * hash method helpers
     *
     * @deprecated since 1.4.0 use \Zikula\Module\UsersModule\Helper\HashMethodListHelper instead
     */
    class Users_Helper_HasMethodList extends \Zikula\Module\UsersModule\Helper\HashMethodListHelper
    {
    }
}

The problem are the classes located in Translation/Extractor/File, enterNode function. Example from TranslationContainerExtractor:

if ($node instanceof \PHPParser_Node_Stmt_Namespace) {
            $this->namespace = implode('\\', $node->name->parts);
            $this->useStatements = array();

            return;
        }

$node->name is null when using the global namespace as it is done in the file above. This results in an error with the implode function. Possible fix (also needs to be applied in the other files using the enterNode function):

if ($node instanceof \PHPParser_Node_Stmt_Namespace) {
            $this->namespace = $node->name !== null ? implode('\\', $node->name->parts) : null;
            $this->useStatements = array();

            return;
        }

[Nyholm]

Fixed by #354