Need help compiling on Apple for "Add unity build" PR

[yarolig]

Hi.

I have a pull request and I concerned slightly about buildability on Mac OS. I do not want to break it so...

Could someone check if this pull request compiling?

commit  c628d1cfde3e11c6019747c6623fdf9027d0ef0d from _https://github.com/yarolig/OpenXcom/tree/unity-build
Pull request _https://github.com/MeridianOXC/OpenXcom/pull/131

(Can't post links here)