Add back erroneously removed alert handler

Fix up d26e582cc1.
Closes #16655.
PR #16657.

src/base/bittorrent/session.cpp

@@ -4651,6 +4651,8 @@ void Session::handleAlert(const lt::alert *a)
         case lt::fastresume_rejected_alert::alert_type:
         case lt::torrent_checked_alert::alert_type:
         case lt::metadata_received_alert::alert_type:
+            dispatchTorrentAlert(a);
+            break;
         case lt::state_update_alert::alert_type:
             handleStateUpdateAlert(static_cast<const lt::state_update_alert*>(a));
             break;