Honor the odd startup setting from org-mode files.

src/compare/diff.rs

@@ -490,11 +490,11 @@ fn compare_heading<'s>(
     let level = get_property(emacs, ":level")?
         .ok_or("Level should not be nil")?
         .as_atom()?;
-    if rust.stars.to_string() != level {
+    if rust.level.to_string() != level {
         this_status = DiffStatus::Bad;
         message = Some(format!(
             "Headline level do not match (emacs != rust): {} != {}",
-            level, rust.stars
+            level, rust.level
         ))
     }