98f5224d4c
Previously the following were treated as equal "MIDI_foo" == "MIDI bar" So std::map<> PortManager::_ports and PortEngineSharedImpl:_ports could only have either. This resulted in missing ports and missing calls to existing ports in cycle_start(). This mainly affected MIDI tracks with imported files, since there is "MIDI Clock in", and imported files result in tracks "MIDI_file-name". This issue was introduced in 6.6-200-g60ff3ef764
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