Issue 4459/1: Mark mark_smob () member functions as const

[lilypond.git] / lily / book.cc

diff --git a/lily/book.cc b/lily/book.cc
index 8ba2aac9080432144e58aa035a70575871dd7b50..bf324091041b73cc21650863fb18857036cb429b 100644 (file)
--- a/lily/book.cc
+++ b/lily/book.cc
@@ -107,7 +107,7 @@ Book::~Book ()
 
 
 SCM
-Book::mark_smob ()
+Book::mark_smob () const
 {
   if (paper_)
     scm_gc_mark (paper_->self_scm ());