Fix #1918: ValueError on trying to import
Fix #1918: ValueError on trying to import

ibmibmibm/beets,beetbox/beets,sampsyo/beets,SusannaMaria/beets,jackwilsdon/beets,ibmibmibm/beets,shamangeorge/beets,sampsyo/beets,shamangeorge/beets,ibmibmibm/beets,shamangeorge/beets,jackwilsdon/beets,jackwilsdon/beets,shamangeorge/beets,sampsyo/beets,SusannaMaria/beets,ibmibmibm/beets,beetbox/beets,beetbox/beets,jackwilsdon/beets,beetbox/beets,SusannaMaria/beets,sampsyo/beets,SusannaMaria/beets