Wrong type unification of enums and structs in case of name and structural equality

[ironcev]

This example compiles, treating the two enums named E as the same type, and two struct S respectively.

// lib_a.sw
library;
pub enum E { X: u8, }
pub struct S { pub x: u8, }

...

// lib_b.sw
library;
pub enum E { X: u8, }
pub struct S { pub x: u8, }

...

// main.sw
script; 

mod lib_a;
mod lib_b;

use ::lib_a::E as Lib_A_E;
use ::lib_a::S as Lib_A_S;

use ::lib_b::E as Lib_B_E;
use ::lib_b::S as Lib_B_S;

fn main() {
  let _: Lib_A_E = Lib_B_E::X(123);     // Two different enums unified.
  let _: Lib_A_S = Lib_B_S { x: 123 };  // Two different structs unified.
}