Hiding accidental for tied note after line break

[Thomas Scharkowski]

Hi,

I do not want to display an accidental for a tied note after a line 
break (lilyponds default is to diplay one [why?]).

\once \override Accidental #'stencil = ##f
or 
\once \override Accidental #'transparent = ##t 

works, but the tie at the beginning of the line gets shortened to 
reserve space for the accidental.
How can I change this?

Thank you
Thomas