CRASH album append score without initial clef on first measure
album_clef-first-meas-02.mscx starts without an initial clef on 2nd staff:
When joined, the missing initial clef in 2nd staff seems to cause a crash on 2.0.3 and master a65f06b. Replication steps:
- add scores "album_clef-first-meas-01.mscx" & "album_clef-first-meas-02.mscx"
- join scores
Probably a result of my initial clef album joining code not taking into account this unusual situation. But I guess since musescore permits such a score to be saved, the album join code should account for it.