Implement slaved boolean automation and update mute special-case

[ardour.git] / libs / evoral / evoral / ControlList.hpp

diff --git a/libs/evoral/evoral/ControlList.hpp b/libs/evoral/evoral/ControlList.hpp
index b58c186c216c5fa1be2c293e6c46a7e4f229431e..2a80ad5bd4e16daff158e88e822dc0f4cb412434 100644 (file)
--- a/libs/evoral/evoral/ControlList.hpp
+++ b/libs/evoral/evoral/ControlList.hpp
@@ -225,7 +225,7 @@ public:
         * @param ok boolean reference if returned value is valid
         * @returns parameter value
         */
-       double rt_safe_eval (double where, bool& ok) {
+       double rt_safe_eval (double where, bool& ok) const {
 
                Glib::Threads::RWLock::ReaderLock lm (_lock, Glib::Threads::TRY_LOCK);