fix: match exposeHostFunction signature for wasi

[notxorand]

wasi.zig currently use function signature that doesn't match the exposeHostFunction pattern. that doesn't work

[notxorand]

btw, i figured the host context is probably for passing runtime state to the host functions (from my perspective a pointer usize) for their use. i think that should be documented somewhere

[malcolmstill]

@notxorand sorry for the delay and thank you for the fix.

The fact that the bug exists speaks to the lack of testing of the wasi stuff.

btw, i figured the host context is probably for passing runtime state to the host functions (from my perspective a pointer usize) for their use. i think that should be documented somewhere

I agree. Would also be open to giving this a different name (e.g. user_data like in drmModePageFlip) or perhaps even defining a union like epoll_data.

[notxorand]

I agree. Would also be open to giving this a different name (e.g. user_data like in drmModePageFlip) or perhaps even defining a union like epoll_data.

imo, the name is quite clear as is if communicated via a comment