'use' doesn't work on normal structs

[Hejsil]

Since all files are now empty structs, I'd assume this should work, as there is no semantic difference between having S and A be files or structs.

const A = struct {
    pub fn a() void {}
};

const S = struct {
    pub use @import("a.zig");
};

test "" {
    S.a(); // test.zig:10:6: error: container 'S' has no member called 'a'
}

[emekoi]

related #1214.