- class transform_attribute fully tested and written

- generating of this type works!

Source/charon/payloads/payload.c

@@ -54,6 +54,7 @@ mapping_t payload_type_t_mappings[] = {
 	{HEADER, "HEADER"},
 	{PROPOSAL_SUBSTRUCTURE, "PROPOSAL_SUBSTRUCTURE"},
 	{TRANSFORM_SUBSTRUCTURE, "TRANSFORM_SUBSTRUCTURE"},
+	{TRANSFORM_ATTRIBUTE, "TRANSFORM_ATTRIBUTE"},
 	{MAPPING_END, NULL}
 };