2003 -> 2004

[lilypond.git] / lily / pitch-squash-engraver.cc

diff --git a/lily/pitch-squash-engraver.cc b/lily/pitch-squash-engraver.cc
index 566d6b020e8d0f971f1a41742af69e153be82a2d..ef5f33580393c8bc81abb9382daf46d09cd4c598 100644 (file)
--- a/lily/pitch-squash-engraver.cc
+++ b/lily/pitch-squash-engraver.cc
@@ -3,7 +3,7 @@
   
   source file of the GNU LilyPond music typesetter
   
-  (c)  1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   
  */
 #include "staff-symbol-referencer.hh"
@@ -22,7 +22,8 @@ void
 Pitch_squash_engraver::acknowledge_grob (Grob_info i)
 {
   SCM newpos = get_property ("squashedPosition");
-  if (Note_head::has_interface (i.grob_))
+  if (gh_number_p (newpos)
+      && Note_head::has_interface (i.grob_))
     {
       i.grob_->set_grob_property ("staff-position", newpos);
     }