Fixed loop inside loop issue.

[orizi]

Closes #5438

---

This change is 

[gilbens-starkware]

Reviewed 2 of 3 files at r1, all commit messages.
Reviewable status: 2 of 3 files reviewed, 1 unresolved discussion (waiting on @orizi)

---

crates/cairo-lang-lowering/src/lower/mod.rs line 319 at r1 (raw file):

) -> Maybe<FlatLowered> {
    let mut ctx = LoweringContext::new(encapsulating_ctx, function_id, loop_signature.clone())?;
    let old = std::mem::replace(&mut ctx.current_loop_expr_id, Some(loop_expr_id));

Suggestion:

old_loop_expr_id

[gilbens-starkware]

Reviewed 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @orizi)