NPE during view attribute accessor resolving when lacking an explicit version mapping

[beikov]

Description

Resolving of the entity view attribute accessor fails with a NPE when there is no explicit mapping in the view. A possible workaround is to simply map the version attribute for now.

Expected behavior

Actual behavior

Steps to reproduce

Environment

Version: 1.3.1
JPA-Provider: -
DBMS: -
Application Server: -