PDO::PARAM_INT casts to 32bit int internally even on 64bit builds in pdo_mysql with libmysqlclient driver

[okhowang]

Description

same with https://bugs.php.net/bug.php?id=63916
but in pdo_mysql with libmysqlclient driver

PHP Version

master

Operating System

No response

[SakiTakamachi]

I have identified the cause and have fixed it. If the test passes, I will open a PR.