2003 -> 2004

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

diff --git a/lily/pitch-squash-engraver.cc b/lily/pitch-squash-engraver.cc
index 8008d4d9ccf8c8860f54fdc0f53626eeac9bbfca..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);
     }
@@ -35,11 +36,12 @@ Pitch_squash_engraver::Pitch_squash_engraver()
 }
 
 ENTER_DESCRIPTION(Pitch_squash_engraver,
-/* descr */       "Treat all pitches as middle C.  Note that the notes move, but
-the locations of accidentals stay the same. 
-Set the position field of all note heads to zero. This useful for
-making a single line staff that demonstrates the rhythm of a melody.",
+/* descr */       "Treat all pitches as middle C.  Note that the notes move, but "
+"the locations of accidentals stay the same. "
+"Set the position field of all note heads to zero. This useful for "
+"making a single line staff that demonstrates the rhythm of a melody.",
 /* creats*/       "",
-/* acks  */       "note-head-interface",
+/* accepts */     "",
+/* acks  */      "note-head-interface",
 /* reads */       "squashedPosition",
 /* write */       "");