[Bug libstdc++/102259] ifstream::read(…, count) fails when count >= 2^31 on darwin

[mimomorin at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102259

--- Comment #11 from Michel Morin <mimomorin at gmail dot com> ---
Brilliant, I appreciate it!
I tested with an 8 GB file and confirmed that this fixes the issue on both
Intel and Apple silicon Macs.