Data pilot of OpenOffice adds text (empty) to indicate empty lines.
There is no way to change it, to do not show any text to indicate empty lines.

Problem is that i use English OO UI, with Lithuanian locale, to create data
pilot in German document, where default language is german.

Options: 
- User can enter any text instead (Empty). this should option when creating 
data pilot, it would be annoying to delete it after every refresh
- text should be writtenn according default selected language in document.