apply the correct result type when lifting functions

[incertia]

should address #209 but i'm not sure if what i did is entirely good

either way it's a 2 line change so it should be quick and easy

as a side note it looks like 0.8.0 was not pushed to crates.io

[MarijnS95]

as a side note it looks like 0.8.0 was not pushed to crates.io

See #204 and all the relevant linked issues, SPIRV-Headers caused a semver issue leading to 0.8.0 to be yanked. We're in the process of rectifying that and can hopefully merge most of the outstanding PRs before finally publishing the long-awaited crate updates ASAP 😬

[MarijnS95]

I'm not entirely familiar with this code either, but the end result looks sound. At least we're not appending a new "void" type for every function anymore which is a good thing.