Resolve error when initializing a struct with explicit module

[burg]

This doesn't make any sense to me.

Test case

mod buildings {
    struct Tower { height: uint }
}

fn main() {
    let sears = buildings::Tower { height: 1451 };
    io::println(sears.height.to_str());
}

Output

[burg@host-7-150 Desktop]# rustc test.rs
test.rs:6:16: 6:32 error: `buildings::Tower` does not name a structure
test.rs:6     let sears = buildings::Tower { height: 1451 };
                          ^~~~~~~~~~~~~~~~
error: aborting due to previous error

[catamorphism]

Dup of #3767