False positive on user class named Crypt

In my project there is a class named **Crypt**.
PHPCompatibility produces false positive messing it with built-in **crypt** function.
Example:
```php
$crypt = new Crypt('password');
```
```
The "salt" parameter for function Crypt() is missing.
Passing this parameter is strongly recommended since
PHP 5.6 
```
