Cgen error on multi return using generic reference

[larpon]

Describe the bug

==================
/dev/shm/v_1000/ttt.01HZ2AVGWZ3T09RBVJKJS01YQP.tmp.c:13147: error: cannot convert 'struct main__Asset' to 'struct main__Asset *'
...
==================

Reproduction Steps

module main

pub enum AssetGetStatus {
    ok
    error
}

struct Sound {}

struct Asset {}

pub fn get[T]() (T, AssetGetStatus) {
    $if T is Sound {
        return Sound{}, AssetGetStatus.ok
    } $else $if T is &Asset {
        return &Asset{}, AssetGetStatus.ok
    } $else {
        $compile_error('get[T]: only retreival of Sound and &Asset is currently supported')
    }
    // Should not could be reached:
    return T{}, AssetGetStatus.error
}

fn main() {
    asset, status := get[&Asset]()
    dump(asset)
    dump(status)
}

Expected Behavior

Clean compile and dump output

Current Behavior

==================
/dev/shm/v_1000/ttt.01HZ2AVGWZ3T09RBVJKJS01YQP.tmp.c:13147: error: cannot convert 'struct main__Asset' to 'struct main__Asset *'
...
==================

Possible Solution

The &Asset could be wrapped in a stack-based type, e.g: AssetRef but it is a little cumbersome to work with manual wrapping and unwrapping like that 🙂

Additional Information/Context

No response

V version

V 0.4.6 09eaae5

Environment details (OS name and version, etc.)

Linux, EndeavourOS (rolling, Arch based)

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