Fix compile errors in libs/evoral/test/, by explicitly calling
Evoral::MusicalTime::to_double() wherever a double value is required of a
MusicalTime.
Some of the double variables should probably really be made into MusicalTime
ones instead, but I don't want to mess with this too much.
takeFiveTest still fails for me after this, but a failing test is probably
more informative in the long run than a test that won't even compile.
3a6c9e3bb9