mpd: Minor code cleanups in URI mapper helper
mpd: Minor code cleanups in URI mapper helper

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