Fix auto capture alignment when bouncing metronome

libs/ardour/track.cc

@@ -760,8 +760,20 @@ Track::set_align_choice_from_io ()
 
 			connections.clear ();
 		}
+
+		/* Special case bounding the Metronome.
+		 * Click-out is aligned to output and hence
+		 * equivalent to a physical round-trip alike
+		 * ExistingMaterial.
+		 */
+		if (!have_physical && _session.click_io ()) {
+			if (_session.click_io ()->connected_to (_input)) {
+				have_physical = true;
+			}
+		}
 	}
 
+
 #ifdef MIXBUS
 	// compensate for latency when bouncing from master or mixbus.
 	// we need to use "ExistingMaterial" to pick up the master bus' latency