修复：修改数据库备份报错bug

extend/backup/Backup.php

@@ -320,7 +320,6 @@ class Backup
             //备份数据记录
             $result = $db->query("SELECT * FROM `{$table}` LIMIT {$start}, 1000");
             foreach ($result as $row) {
-                $row = array_map('addslashes', $row);
                 $sql = "INSERT INTO `{$table}` VALUES ('" . str_replace(array("\r", "\n"), array('\\r', '\\n'), implode("', '", $row)) . "');\n";
                 if (false === $this->write($sql)) {
                     return false;