TransportMasterWidget may not have a session
Other parts in this dialog already test for session == nullptr. This can happen in the Preferences, when switching a timecode master w/o a session (not possible in Ardour, but some derivative project).
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@ -124,7 +124,9 @@ TransportMastersWidget::~TransportMastersWidget ()
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void
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TransportMastersWidget::set_transport_master (std::shared_ptr<TransportMaster> tm)
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{
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_session->request_sync_source (tm);
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if (_session) {
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_session->request_sync_source (tm);
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}
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}
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void
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