Use Py_ssize_t to count the
diff --git a/Python/symtable.c b/Python/symtable.c
index 7f3f5db..fd95bd5 100644
--- a/Python/symtable.c
+++ b/Python/symtable.c
@@ -715,7 +715,7 @@
 static int
 symtable_exit_block(struct symtable *st, void *ast)
 {
-	int end;
+	Py_ssize_t end;
 
 	Py_DECREF(st->st_cur);
 	end = PyList_GET_SIZE(st->st_stack) - 1;