Fix 352.

[lilypond.git] / lily / ambitus-engraver.cc

diff --git a/lily/ambitus-engraver.cc b/lily/ambitus-engraver.cc
index 0e4e2d949b8006bfb899909b10837a1d9176e0f5..cd5402b2a0ac50768f80209484a92dc9d435c3c6 100644 (file)
--- a/lily/ambitus-engraver.cc
+++ b/lily/ambitus-engraver.cc
@@ -89,10 +89,7 @@ void
 Ambitus_engraver::process_music ()
 {
   /*
-   * Ensure that ambitus is created in the very first timestep (on
-   * which lily does not call start_translation_timestep ()).
-   * Otherwise, if a voice begins with a rest, the ambitus grob will
-   * be placed after the rest.
+   * Ensure that ambitus is created in the very first timestep
    */
   if (!ambitus_)
     create_ambitus ();
@@ -149,7 +146,7 @@ Ambitus_engraver::finalize ()
                                start_key_sig_);
 
          Rational sig_alter = (handle != SCM_BOOL_F)
-           ? ly_scm2rational (scm_cdr (handle)) : Rational (0);
+           ? robust_scm2rational (scm_cdr (handle), Rational (0)) : Rational (0);
 
          if (sig_alter == p.get_alteration ())
            {