fixed: Crash when scanning music without any scraper set
changed: It's nicer to close the music db on failure
fixed: Music album info gets stuck on failure (fixes #14435)
changed: Make more obvious we're passing a CFileItem
fixed: SQL query was wrong
fixed: Formatting (cosmetics)
fixed: artist was being added as genre to music album table
fixed: Locally found music album art was not stored in the db ((partially?) fixes #14345)
Merge pull request #2906 from arnova/music_db_fixes

Music info/db (regression) fixes