[MusicXML import] crash on Mac if file contains explicit accidental
Importing any MusicXML file containing an explicit accidental fails, MuseScore abort with message:
ASSERT: "val >= AccidentalVal::FLAT2 && val <= AccidentalVal::SHARP2" in file /Users/lvi/dev/MuseScore/libmscore/key.h, line 93
This happens for all files with accidentals in mtest/musicxml/io:
Don't know when this was introduced, but when my last pull request was merged (May 22) all regression test files imported OK. Apart from the enum class changes, no changes to the MusicXML importer were made last week.