fix crash on session unload

diff --git a/gtk2_ardour/meter_strip.cc b/gtk2_ardour/meter_strip.cc
index 91b93ad8bb28da2fc4ed377c69e0a4e255fcc097..ff98652e1e3503f9a32e800c07eb880d31626f49 100644 (file)
--- a/gtk2_ardour/meter_strip.cc
+++ b/gtk2_ardour/meter_strip.cc
@@ -267,6 +267,7 @@ void
 MeterStrip::set_session (Session* s)
 {
        SessionHandlePtr::set_session (s);
+       if (!s) return;
        s->config.ParameterChanged.connect (*this, invalidator (*this), ui_bind (&MeterStrip::parameter_changed, this, _1), gui_context());
        update_button_box();
        update_name_box();