[php-src] Issue #20823: Integer overflow on 32bit PHP caused by GH-20601

Issue: https://github.com/php/php-src/issues/20823
Author: tml

### Description

The following code:

```php
<?php
ftp_connect("localhost", 21, 90);
```

Resulted in this output:
```
Fatal error: Uncaught ValueError: ftp_connect(): Argument #3 ($timeout) must be less than -2147483648 in...
```

This problem is not reproducible on 64-bt PHP.

### PHP Version

```plain
php -v
PHP 8.4.16 (cli) (built: Dec 23 2025 02:03:22) (ZTS)
Copyright (c) The PHP Group
Zend Engine v4.4.16, Copyright (c) Zend Technologies
    with Zend OPcache v8.4.16, Copyright (c), by Zend Technologies

uname:
Linux gatto.corradoroberto.it 6.1.144-server.corradoroberto.it #1 SMP PREEMPT_DYNAMIC Sat Jul 12 10:14:46 CEST 2025 i686 Intel(R) Core(TM) i5-9500 CPU @ 3.00GHz GenuineIntel GNU/Linux
```

### Operating System

Any 32-bit Linux