Where to change the begin of a broken spanner after a line break?

[Reinhold Kainhofer]

I'm currently also trying to fix issue #650, where after a line break a broken 
hairpin starts a bit too early, so the treble clef shifts up the hairpin 
considerable:
http://code.google.com/p/lilypond/issues/detail?id=650

Unfortunately, I can't find out where the start of a broken hairpin (spanner 
in general) is determined.

BTW, the same problem also happens with ottava brackets, volta brackets, etc. 
but NOT with text cresc spanners, trill spanners, normal text spanners or 
tuplet brackets.

As Hairpin and DynamicTextSpanner grobs are treated completely equal in the 
New_dynamic_engraver, I assume it must be some problem with grob settings of 
the Hairpin grob. Any idea?

This would solve both issue 650 and 651.

Thanks,
Reinhold
-- 
------------------------------------------------------------------
Reinhold Kainhofer, address@hidden, http://reinhold.kainhofer.com/
 * Financial & Actuarial Math., Vienna Univ. of Technology, Austria
 * http://www.fam.tuwien.ac.at/, DVR: 0005886
 * LilyPond, Music typesetting, http://www.lilypond.org