Fix named semaphore init value.

[jpd002]

Pull Request checklist

Note: these are not necessarily requirements

• [x] I reformatted the code with clang-format
• [x] I checked to make sure my submission worked
• [x] I am the author of submission or have permission from the original author
• [n/a] Requires update of the PS2SDK or other dependencies
• [ ] Others (please specify below)

Pull Request description

Fixes initial value of semaphore when using named semaphores. pfsshell was deadlocking when running on macOS otherwise.

[uyjulian]

Thanks for this!

[AKuHAK]

Mmm building failed