Issue when the ng-translate is under other directive.

Hi guys, I had an issue with this directive in the case we were calling it under another directive. A member of my team realized that it could be fixed just inspecting the newValue in the $watch, making sure that is not 'undefined'.

It has been tested, and works fine for the whole project.
We're still looking for a possible fix for the ng-pluralize directive.

Regards,
Leonardo.-