Doc: NR - changing-defaults.itely - various improvements

[lilypond.git] / lily / stencil.cc

diff --git a/lily/stencil.cc b/lily/stencil.cc
index 41eb2f1e852498c7fc0cf454f9c9c892b124b307..987a879053dd808f7775c4b52ae94eb1d7438b09 100644 (file)
--- a/lily/stencil.cc
+++ b/lily/stencil.cc
@@ -39,7 +39,7 @@ Stencil::Stencil (Box b, SCM func)
 }
 
 SCM
-Stencil::mark_smob ()
+Stencil::mark_smob () const
 {
   return expr_;
 }
@@ -55,7 +55,7 @@ Stencil::extent (Axis a) const
 bool
 Stencil::is_empty () const
 {
-  return (expr_ == SCM_EOL
+  return (scm_is_null (expr_)
           || dim_.is_empty ());
 }