Fix coverage

Author: Tinche

src/cattrs/gen/__init__.py

@@ -551,6 +551,12 @@ def make_dict_structure_fn_from_attrs(
         # The first loop deals with required args.
         for a in attrs:
             an = a.name
+
+            if a.default is not NOTHING:
+                non_required.append(a)
+                # The next loop will handle it.
+                continue
+
             if an in kwargs:
                 override = kwargs[an]
             else:
@@ -562,9 +568,7 @@ def make_dict_structure_fn_from_attrs(
                 continue
             if override.omit is None and not a.init and not _cattrs_include_init_false:
                 continue
-            if a.default is not NOTHING:
-                non_required.append(a)
-                continue
+
             t = a.type
             if isinstance(t, TypeVar):
                 t = typevar_map.get(t.__name__, t)