rewrite Self_alignment_interface

lily/new-dynamic-engraver.cc

 /*
   This file is part of LilyPond, the GNU music typesetter.
 
   Copyright (C) 2008--2012 Han-Wen Nienhuys <hanwen@lilypond.org>
 
   LilyPond is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
 
@@ skipping 253 matching lines @@
       /*
         Spacing constraints may require dynamics to be aligned on rests,
         so check for a rest if this note column has no note heads.
       */
       Grob *x_parent = (heads.size ()
                         ? heads[0]
                         : unsmob_grob (info.grob ()->get_object ("rest")));
       if (x_parent)
         {
           script_->set_parent (x_parent, X_AXIS);
-          Self_alignment_interface::set_center_parent (script_, X_AXIS);
         }
       if (stem)
         Pointer_group_interface::add_grob (script_, ly_symbol2scm ("potential-X-colliding-grobs"), stem);
     }
 
   if (current_spanner_ && !current_spanner_->get_bound (LEFT))
     current_spanner_->set_bound (LEFT, info.grob ());
   if (finished_spanner_ && !finished_spanner_->get_bound (RIGHT))
     finished_spanner_->set_bound (RIGHT, info.grob ());
 }
@@ skipping 11 matching lines @@
                 /* read */
                 "crescendoSpanner "
                 "crescendoText "
                 "currentMusicalColumn "
                 "decrescendoSpanner "
                 "decrescendoText ",
 
                 /* write */
                 ""
                );