fix recently-added crash when adding new tracks+busses

git-svn-id: svn://localhost/ardour2/branches/3.0@6339 d708f5d6-7413-0410-9779-e7cbd77b26cf

diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index 24700b889305bbfb035fd0d17bfaf254d152f7ab..7b0e0603cb82dd7176bffa21c74f2abd5b25a612 100644 (file)
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -1651,7 +1651,9 @@ Session::new_midi_track (TrackMode mode, RouteGroup* route_group, uint32_t how_m
                        */
 
                        track->midi_diskstream()->non_realtime_input_change();
-                       route_group->add (track);
+                       if (route_group) {
+                               route_group->add (track);
+                       }
 
                        track->DiskstreamChanged.connect (mem_fun (this, &Session::resort_routes));
                        //track->set_remote_control_id (control_id);
@@ -1822,7 +1824,9 @@ Session::new_audio_track (int input_channels, int output_channels, TrackMode mod
 
                        channels_used += track->n_inputs ().n_audio();
 
-                       route_group->add (track);
+                       if (route_group) {
+                               route_group->add (track);
+                       }
 
                        track->audio_diskstream()->non_realtime_input_change();
 
@@ -2001,7 +2005,9 @@ Session::new_audio_route (bool aux, int input_channels, int output_channels, Rou
 
                        channels_used += bus->n_inputs ().n_audio();
 
-                       route_group->add (bus);
+                       if (route_group) {
+                               route_group->add (bus);
+                       }
                        bus->set_remote_control_id (control_id);
                        ++control_id;