Doc: Usage - update Convert-ly chapters

[lilypond.git] / lily / note-heads-engraver.cc

diff --git a/lily/note-heads-engraver.cc b/lily/note-heads-engraver.cc
index 1b46789e76d28346d49c79182b8072973333863b..f2d2159f773c4858858dd8504628d5408602d543 100644 (file)
--- a/lily/note-heads-engraver.cc
+++ b/lily/note-heads-engraver.cc
@@ -100,7 +100,7 @@ Note_heads_engraver::process_music ()
         {
           SCM scm_tonic = get_property ("tonic");
           Pitch tonic;
-          if (Pitch::unsmob (scm_tonic))
+          if (Pitch::is_smob (scm_tonic))
             tonic = *Pitch::unsmob (scm_tonic);
 
           unsigned int delta = (pit->get_notename () - tonic.get_notename () + 7) % 7;