REGRESSION: Empty xinha results in exception

Create new News document.
Empty the body field.
Click save

exception dialog is shown with text:
javax.jcr.nodetype.ConstraintViolationException: /content/documents/news/rtewt/rtewt[2]/defaultcontent:body: mandatory property

{http://www.onehippo.org/jcr/hippostd/nt/2.0}

content does not exist