Avoid endless loop in 'next' and 'previous'.
Avoid endless loop in 'next' and 'previous'.

vrs01/mopidy,ZenithDK/mopidy,jodal/mopidy,kingosticks/mopidy,vrs01/mopidy,jcass77/mopidy,adamcik/mopidy,ZenithDK/mopidy,vrs01/mopidy,jcass77/mopidy,ZenithDK/mopidy,adamcik/mopidy,mopidy/mopidy,jcass77/mopidy,mopidy/mopidy,jodal/mopidy,ZenithDK/mopidy,kingosticks/mopidy,jodal/mopidy,vrs01/mopidy,mopidy/mopidy,adamcik/mopidy,kingosticks/mopidy