mixbus: don't assert(ch_post()) in case we use various methods on "odd" Routes in...

diff --git a/libs/ardour/route.cc b/libs/ardour/route.cc
index fb417305d75e6266872e0868d89007035ac3531d..76c4b1af45285e6d8542490df6dd5e8840c158b0 100644 (file)
--- a/libs/ardour/route.cc
+++ b/libs/ardour/route.cc
@@ -5151,7 +5151,9 @@ Route::pan_azimuth_control() const
 {
 #ifdef MIXBUS
        boost::shared_ptr<ARDOUR::PluginInsert> plug = ch_post();
-       assert (plug);
+       if (!plug) {
+               return boost::shared_ptr<AutomationControl>();
+       }
        const uint32_t port_channel_post_pan = 2; // gtk2_ardour/mixbus_ports.h
        return boost::dynamic_pointer_cast<ARDOUR::AutomationControl> (plug->control (Evoral::Parameter (ARDOUR::PluginAutomation, 0, port_channel_post_pan)));
 #else
@@ -5510,7 +5512,9 @@ Route::send_level_controllable (uint32_t n) const
 {
 #ifdef  MIXBUS
        boost::shared_ptr<ARDOUR::PluginInsert> plug = ch_post();
-       assert (plug);
+       if (!plug) {
+               return boost::shared_ptr<AutomationControl>();
+       }
 
        if (n >= 8) {
                /* no such bus */
@@ -5533,7 +5537,9 @@ Route::send_enable_controllable (uint32_t n) const
 {
 #ifdef  MIXBUS
        boost::shared_ptr<ARDOUR::PluginInsert> plug = ch_post();
-       assert (plug);
+       if (!plug) {
+               return boost::shared_ptr<AutomationControl>();
+       }
 
        if (n >= 8) {
                /* no such bus */
@@ -5577,7 +5583,9 @@ Route::master_send_enable_controllable () const
 {
 #ifdef  MIXBUS
        boost::shared_ptr<ARDOUR::PluginInsert> plug = ch_post();
-       assert (plug);
+       if (!plug) {
+               return boost::shared_ptr<AutomationControl>();
+       }
        return boost::dynamic_pointer_cast<ARDOUR::AutomationControl> (plug->control (Evoral::Parameter (ARDOUR::PluginAutomation, 0, port_channel_post_mstr_assign)));
 #else
        return boost::shared_ptr<AutomationControl>();