X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Ftab-note-heads-engraver.cc;h=4d47d77982a33d4ae34dff062a2862f0e11ed395;hb=bf5e12cca7be0cf62014de7186dffaebbee13bfa;hp=42dd7e4b1fdb7e9351c8d178f1145a37b23e3ed5;hpb=d2762a4f1add2bb04d6fc34d3c7ae03eeb7d500f;p=lilypond.git

diff --git a/lily/tab-note-heads-engraver.cc b/lily/tab-note-heads-engraver.cc
index 42dd7e4b1f..4d47d77982 100644
--- a/lily/tab-note-heads-engraver.cc
+++ b/lily/tab-note-heads-engraver.cc
@@ -111,12 +111,12 @@ Tab_note_heads_engraver::process_music ()
   bool length_changed = (note_events_.size () != fret_count);
   vsize index;
 
-  if (string_fret_finger != SCM_EOL)
+  if (!scm_is_null (string_fret_finger))
     for (vsize i = 0; i < fret_count; i++)
       {
         note_entry = scm_list_ref (string_fret_finger, scm_from_int (i));
         string_number = scm_car (note_entry);
-        if (string_number != SCM_BOOL_F)
+        if (scm_is_true (string_number))
           {
             fret = scm_cadr (note_entry);
             fret_label = scm_call_3 (fret_procedure,