Fixes bug which prevented Airshipper launching on Windows (as attempted 23Apr24 and 24Apr24)

[mrexcessive]

Updated client/src/windows.rs So that all 4 invocations of .asset_for(,) provide a second required Option<,> parameter. Note that this fix provides None

But it seems to work and the client launches fine, and the game runs fine.

See discussion here, https://www.reddit.com/r/Veloren/comments/1caz7vn/is_there_a_stable_windows_build_airshipper_doesnt/

[mrexcessive]

The project doesn't build (tested on Windows) without this patch, or something like it (you may have a better solution).

[Imberflur]

This repo was moved to https://gitlab.com/veloren/airshipper (and the github is now a mirror)

[mrexcessive]

OK I don't have an account on gitlab. Maybe someone else can apply the patch and fix the windows distro.

[Imberflur]

@mrexcessive sounds good, will try to remember to post here when it is applied

[Imberflur]

it will be included when this is merged https://gitlab.com/veloren/airshipper/-/merge_requests/122

[mrexcessive]

Thanks so much @Imberflur :) Appreciate your help!