fix null ptr deferef in pre_save python mutator call
@@ -244,7 +244,7 @@ size_t pre_save_py(u8* buf, size_t buf_size, u8** out_buf) {
size_t out_buf_size;
PyObject *py_args, *py_value;
- py_args = PyTuple_New(2);
+ py_args = PyTuple_New(1);
py_value = PyByteArray_FromStringAndSize(buf, buf_size);
if (!py_value) {
