dow.c:157:25 integer overflow

### Description

The following code:

```php
<?php
$date = date_create();
date_isodate_set($date, date('Y'), PHP_INT_MAX);
```

Resulted in this output:
```
/home/dan/php-src/ext/date/lib/dow.c:157:25: runtime error: signed integer overflow: 9223372036854775806 * 7 cannot be represented in type 'long long int'
```




### PHP Version

PHP 8.4-dev

### Operating System

_No response_