pyloxi: support (only) empty 1.2/1.3 matches
diff --git a/py_gen/oftype.py b/py_gen/oftype.py
index 3beb8e3..44356e2 100644
--- a/py_gen/oftype.py
+++ b/py_gen/oftype.py
@@ -125,8 +125,8 @@
         elif self.base == 'of_list_hello_elem_t':
             return 'common.unpack_list_hello_elem(%s)' % (reader_expr)
         elif self.base == 'of_list_oxm_t':
-            # XXX need the match_v3 length field
-            return 'oxm.unpack_list(%s)' % (reader_expr)
+            # TODO
+            return '[]'
         elif self.base == 'of_port_name_t':
             return self._gen_string_unpack_expr(reader_expr, 16)
         elif self.base == 'of_table_name_t' or self.base == 'of_serial_num_t':