Fix various issues when the engine disconnects:
Previously Port::PortDrop was never handled. The signal was disconnected directly when the connection is re-used by Port::PortSignalDrop. Ports::drop() was not called when the engine was stopped or disconnected, and port-handles were not invalidated. This lead to crashes whenever a port-related operation was performed while the engine was stopped. e.g. adding/removing tracks or plugins (latency recompute, notify port-engine) and various other operations.
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@ -183,7 +183,7 @@ private:
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void port_connected_or_disconnected (boost::weak_ptr<Port>, boost::weak_ptr<Port>, bool);
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void signal_drop ();
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void drop ();
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PBD::ScopedConnection drop_connection;
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PBD::ScopedConnectionList drop_connection;
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PBD::ScopedConnection engine_connection;
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};
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