fix crash at session close/exit if a midi-control-surface is used

[ardour.git] / libs / ardour / automation_control.cc

diff --git a/libs/ardour/automation_control.cc b/libs/ardour/automation_control.cc
index 355b0176ced0fe09ad8f6933dad613c4901a8a94..2bb694c7e5d2ca6031dd9b0524521c71b3eb580e 100644 (file)
--- a/libs/ardour/automation_control.cc
+++ b/libs/ardour/automation_control.cc
@@ -85,7 +85,7 @@ AutomationControl::set_list (boost::shared_ptr<Evoral::ControlList> list)
 void
 AutomationControl::set_automation_state (AutoState as)
 {
-       if (as != alist()->automation_state()) {
+       if (_list && as != alist()->automation_state()) {
 
                alist()->set_automation_state (as);