Imported Upstream version 2.18.0

[lilypond.git] / lily / include / output-def.hh

diff --git a/lily/include/output-def.hh b/lily/include/output-def.hh
index 3f44061513064044bf173a496e43c332ac8f8bcc..eff52c2c3845a7b3f47f85a42b2defcaf7595ed7 100644 (file)
--- a/lily/include/output-def.hh
+++ b/lily/include/output-def.hh
@@ -65,7 +65,7 @@ public:
   /*
     variables.
    */
-  SCM c_variable (string id) const;
+  SCM c_variable (const string &id) const;
   SCM lookup_variable (SCM sym) const;
   void set_variable (SCM sym, SCM val);
   void normalize ();