removed undefined-index-warning in album-migrator
removed undefined-index-warning in album-migrator

othmar52/slimpd,othmar52/slimpd,othmar52/slimpd,killhellokitty/slimpd,othmar52/slimpd,othmar52/slimpd,killhellokitty/slimpd,othmar52/slimpd,killhellokitty/slimpd,othmar52/slimpd,killhellokitty/slimpd,killhellokitty/slimpd