amend to 212d2ac5d and 8becd4413 - fix port connection matrix crash on close

diff --git a/gtk2_ardour/port_matrix.cc b/gtk2_ardour/port_matrix.cc
index 0fbbc03fb0a46827f73f644b0a153b46f2ec294c..bac415d72f63760b06973c50f8f9b39bb8f3482f 100644 (file)
--- a/gtk2_ardour/port_matrix.cc
+++ b/gtk2_ardour/port_matrix.cc
@@ -206,6 +206,8 @@ PortMatrix::routes_changed ()
 void
 PortMatrix::setup ()
 {
+       if (!_session) return; // session went away
+
        /* this needs to be done first, as the visible_ports() method uses the
           notebook state to decide which ports are being shown */