* lily/separating-line-group-engraver.cc (acknowledge_grob):

[lilypond.git] / lily / system.cc

diff --git a/lily/system.cc b/lily/system.cc
index 4cf53c114a16577c16bfc05377330211598ad160..ae06cfc9881616c3cfc35d71a16a6e58122febb8 100644 (file)
--- a/lily/system.cc
+++ b/lily/system.cc
@@ -76,7 +76,7 @@ System::output_lines ()
        gh_pair_p (s); s = ly_cdr (s))
     {
       Grob * g = unsmob_grob (ly_car (s));
-      if (Spacing_interface::has_interface (g))
+      if (g->internal_has_interface ("only-prebreak-interface"))
        {
          /*
            Kill no longer needed grobs.