py: Fix types, uint -> mp_uint_t.
diff --git a/py/objfun.c b/py/objfun.c
index eb89a78..49c67c7 100644
--- a/py/objfun.c
+++ b/py/objfun.c
@@ -472,7 +472,7 @@
         return 1;
     } else if (MP_OBJ_IS_STR(obj)) {
         // pointer to the string (it's probably constant though!)
-        uint l;
+        mp_uint_t l;
         return (mp_uint_t)mp_obj_str_get_data(obj, &l);
     } else {
         mp_obj_type_t *type = mp_obj_get_type(obj);
@@ -484,13 +484,13 @@
 #endif
         } else if (type == &mp_type_tuple) {
             // pointer to start of tuple (could pass length, but then could use len(x) for that)
-            uint len;
+            mp_uint_t len;
             mp_obj_t *items;
             mp_obj_tuple_get(obj, &len, &items);
             return (mp_uint_t)items;
         } else if (type == &mp_type_list) {
             // pointer to start of list (could pass length, but then could use len(x) for that)
-            uint len;
+            mp_uint_t len;
             mp_obj_t *items;
             mp_obj_list_get(obj, &len, &items);
             return (mp_uint_t)items;