Replaced outdated macros _PyUnicode_AsString and _PyUnicode_AsStringAndSize
with PyUnicode_AsUTF8 and PyUnicode_AsUTF8AndSize.
diff --git a/Objects/object.c b/Objects/object.c
index 5c639b2..d88ae3b 100644
--- a/Objects/object.c
+++ b/Objects/object.c
@@ -890,7 +890,7 @@
     if (tp->tp_getattro != NULL)
         return (*tp->tp_getattro)(v, name);
     if (tp->tp_getattr != NULL) {
-        char *name_str = _PyUnicode_AsString(name);
+        char *name_str = PyUnicode_AsUTF8(name);
         if (name_str == NULL)
             return NULL;
         return (*tp->tp_getattr)(v, name_str);
@@ -934,7 +934,7 @@
         return err;
     }
     if (tp->tp_setattr != NULL) {
-        char *name_str = _PyUnicode_AsString(name);
+        char *name_str = PyUnicode_AsUTF8(name);
         if (name_str == NULL)
             return -1;
         err = (*tp->tp_setattr)(v, name_str, value);