Remove redundant property initialization with `null`

diff --git a/files/lib/system/exporter/IPB4xExporter.class.php b/files/lib/system/exporter/IPB4xExporter.class.php
index 6ea7e8707dea8bb167c040990f0f4e8bc775fed6..2687be15c51ec7f2d30e35fa45c52fccbf3fd5f2 100644 (file)
--- a/files/lib/system/exporter/IPB4xExporter.class.php
+++ b/files/lib/system/exporter/IPB4xExporter.class.php
@@ -24,15 +24,15 @@ use wcf\util\UserUtil;
 class IPB4xExporter extends AbstractExporter {
        /**
         * language statement
-        * @var \wcf\system\database\statement\PreparedStatement
+        * @var \wcf\system\database\statement\PreparedStatement
         */
-       private $languageStatement = null;
+       private $languageStatement;
        
        /**
         * ipb default language
-        * @var integer
+        * @var integer
         */
-       private $defaultLanguageID = null;
+       private $defaultLanguageID;
        
        /**
         * board cache