only look at 'rest object if it's a Note_column.

diff --git a/lily/note-spacing.cc b/lily/note-spacing.cc
index db70fc4737e4f62edcd1c486efca71302bf1044c..c4a79e403f7b18bb0313ce9a823ab481cf2cd8d3 100644 (file)
--- a/lily/note-spacing.cc
+++ b/lily/note-spacing.cc
@@ -64,7 +64,8 @@ Note_spacing::get_spacing (Grob *me, Item *right_col,
              continue;
            }
 
-         if (d == LEFT)
+         if (d == LEFT
+             && Note_column::has_interface (it))
            {
              SCM r = it->get_object ("rest");
              Grob *g = unsmob_grob (r);