propelorm/Propel2 — pull request #839 by xxdavid (2014-12-09 14:44:19+00:00)
Title: Fix migration of unique/index keys

`propel diff` always generate change of unique/index keys, even if there's no change.
It's because `SchemaReader` passes XML attributes of the `unique-column` so `IndexComperator` compares size of the `unique-column` (which is mostly `null`) with the size of indexed columns.