fix #1490 don't overwrite basename argument
fix #1490 don't overwrite basename argument

jackwilsdon/beets,arabenjamin/beets,SusannaMaria/beets,artemutin/beets,tima/beets,dfc/beets,marcuskrahl/beets,jcoady9/beets,PierreRust/beets,pkess/beets,jmwatte/beets,YetAnotherNerd/beets,arabenjamin/beets,LordSputnik/beets,drm00/beets,swt30/beets,asteven/beets,imsparsh/beets,kelvinhammond/beets,dfc/beets,beetbox/beets,mosesfistos1/beetbox,gabrielaraujof/beets,diego-plan9/beets,LordSputnik/beets,tima/beets,imsparsh/beets,sadatay/beets,diego-plan9/beets,YetAnotherNerd/beets,drm00/beets,shanemikel/beets,m-urban/beets,mried/beets,randybias/beets,xsteadfastx/beets,madmouser1/beets,Andypsamp/CODjunit,asteven/beets,mosesfistos1/beetbox,Freso/beets,parapente/beets,imsparsh/beets,MyTunesFreeMusic/privacy-policy,LordSputnik/beets,Kraymer/beets,beetbox/beets,SusannaMaria/beets,MyTunesFreeMusic/privacy-policy,Freso/beets,arabenjamin/beets,sampsyo/beets,shamangeorge/beets,kareemallen/beets,jcoady9/beets,randybias/beets,PierreRust/beets,mried/beets,jackwilsdon/beets,madmouser1/beets,Andypsamp/CODfinalJUNIT,Andypsamp/CODfinalJUNIT,kelvinhammond/beets,jcoady9/beets,drm00/beets,madmouser1/beets,shanemikel/beets,Kraymer/beets,parapente/beets,LordSputnik/beets,xsteadfastx/beets,Freso/beets,ibmibmibm/beets,SusannaMaria/beets,tima/beets,dfc/beets,lengtche/beets,artemutin/beets,imsparsh/beets,pkess/beets,drm00/beets,Andypsamp/CODfinalJUNIT,beetbox/beets,gabrielaraujof/beets,lightwang1/beets,YetAnotherNerd/beets,Andypsamp/CODjunit,pkess/beets,sampsyo/beets,swt30/beets,sadatay/beets,shanemikel/beets,lightwang1/beets,swt30/beets,dfc/beets,kelvinhammond/beets,jackwilsdon/beets,ibmibmibm/beets,moodboom/beets,mathstuf/beets,jcoady9/beets,m-urban/beets,Andypsamp/CODjunit,moodboom/beets,marcuskrahl/beets,jmwatte/beets,ibmibmibm/beets,tima/beets,pkess/beets,shamangeorge/beets,jmwatte/beets,randybias/beets,mosesfistos1/beetbox,mathstuf/beets,PierreRust/beets,marcuskrahl/beets,jmwatte/beets,m-urban/beets,artemutin/beets,lengtche/beets,diego-plan9/beets,gabrielaraujof/beets,marcuskrahl/beets,lightwang1/beets,mried/beets,mathstuf/beets,randybias/beets,asteven/beets,MyTunesFreeMusic/privacy-policy,shamangeorge/beets,Andypsamp/CODfinalJUNIT,lengtche/beets,kelvinhammond/beets,artemutin/beets,sadatay/beets,Kraymer/beets,Kraymer/beets,SusannaMaria/beets,parapente/beets,sampsyo/beets,arabenjamin/beets,mathstuf/beets,shamangeorge/beets,sadatay/beets,diego-plan9/beets,moodboom/beets,mried/beets,kareemallen/beets,m-urban/beets,Dishwishy/beets,beetbox/beets,ibmibmibm/beets,Dishwishy/beets,xsteadfastx/beets,moodboom/beets,Andypsamp/CODfinalJUNIT,lightwang1/beets,parapente/beets,swt30/beets,Andypsamp/CODjunit,YetAnotherNerd/beets,Freso/beets,mosesfistos1/beetbox,kareemallen/beets,Dishwishy/beets,asteven/beets,lengtche/beets,Andypsamp/CODjunit,MyTunesFreeMusic/privacy-policy,PierreRust/beets,kareemallen/beets,Dishwishy/beets,madmouser1/beets,shanemikel/beets,xsteadfastx/beets,gabrielaraujof/beets,sampsyo/beets,jackwilsdon/beets