Fix BaseCurrentPlaylistController with respect to test_removing_from_empty_playlist
Fix BaseCurrentPlaylistController with respect to test_removing_from_empty_playlist

quartz55/mopidy,pacificIT/mopidy,vrs01/mopidy,pacificIT/mopidy,diandiankan/mopidy,pacificIT/mopidy,bencevans/mopidy,vrs01/mopidy,diandiankan/mopidy,glogiotatidis/mopidy,swak/mopidy,jodal/mopidy,dbrgn/mopidy,adamcik/mopidy,bacontext/mopidy,jcass77/mopidy,priestd09/mopidy,mokieyue/mopidy,mokieyue/mopidy,tkem/mopidy,glogiotatidis/mopidy,vrs01/mopidy,ali/mopidy,kingosticks/mopidy,jmarsik/mopidy,swak/mopidy,glogiotatidis/mopidy,mopidy/mopidy,mokieyue/mopidy,swak/mopidy,hkariti/mopidy,quartz55/mopidy,ZenithDK/mopidy,rawdlite/mopidy,ZenithDK/mopidy,swak/mopidy,diandiankan/mopidy,kingosticks/mopidy,bacontext/mopidy,bencevans/mopidy,hkariti/mopidy,pacificIT/mopidy,abarisain/mopidy,jcass77/mopidy,woutervanwijk/mopidy,glogiotatidis/mopidy,ali/mopidy,ali/mopidy,SuperStarPL/mopidy,jmarsik/mopidy,rawdlite/mopidy,vrs01/mopidy,bacontext/mopidy,dbrgn/mopidy,priestd09/mopidy,mopidy/mopidy,SuperStarPL/mopidy,liamw9534/mopidy,rawdlite/mopidy,liamw9534/mopidy,bacontext/mopidy,jodal/mopidy,abarisain/mopidy,tkem/mopidy,mokieyue/mopidy,ZenithDK/mopidy,SuperStarPL/mopidy,rawdlite/mopidy,tkem/mopidy,dbrgn/mopidy,bencevans/mopidy,tkem/mopidy,priestd09/mopidy,mopidy/mopidy,hkariti/mopidy,ali/mopidy,bencevans/mopidy,quartz55/mopidy,dbrgn/mopidy,jodal/mopidy,quartz55/mopidy,woutervanwijk/mopidy,adamcik/mopidy,kingosticks/mopidy,diandiankan/mopidy,jcass77/mopidy,ZenithDK/mopidy,SuperStarPL/mopidy,adamcik/mopidy,hkariti/mopidy,jmarsik/mopidy,jmarsik/mopidy