Fix when exist record (newest for some domain) in table trans_unit, but there is no record in trans_unit_translations with same trans_unit_id. In this case method returned result where was locale = null, and it crash app.
Fix when exist record (newest for some domain) in table trans_unit, but there is no record in trans_unit_translations with same trans_unit_id. In this case method returned result where was locale = null, and it crash app.

lexik/LexikTranslationBundle,lexik/LexikTranslationBundle