Added error if $HOME/.es_systems.cfg exists, but contains no systems.
Added error if $HOME/.es_systems.cfg exists, but contains no systems.

Herdinger/EmulationStation,jrassa/EmulationStation,jgeumlek/EmulationStation-tweaked,igungor/recalbox-emulationstation,pmoran13800/recalbox-emulationstation,tbhova/EmulationStation,gr33k/EmulationStation,RobLoach/EmulationStation,tschires/emu,Krejza9/EmulationStation-sdlmixer,mgoulartBR/retrobox-emulationstation,jrassa/EmulationStation,larrykoubiak/EmulationStation,sdt/EmulationStation,gr33k/EmulationStation,rockaddicted/recalbox-emulationstation,RobLoach/EmulationStation,tbhova/EmulationStation,rjklawiter/ESpro,asmorgan24/EmulationStation-Marketplace,zigurana/EmulationStation,Spicykiwi/EmulationStation,hevey/EmulationStation,zigurana/EmulationStation,sdt/EmulationStation,Black3v3r/EmulationStation,jrassa/EmulationStation,emerrepengo/recalbox-emulationstation,jgeumlek/EmulationStation-tweaked,recalbox/recalbox-emulationstation,larrykoubiak/EmulationStation,pmoran13800/recalbox-emulationstation,Herdinger/EmulationStation,hdo/EmulationStation,cavedude00/EmulationStation,joolswills/EmulationStation,pimcgcd/esmod,recalbox/recalbox-emulationstation,pimcgcd/esmod,Black3v3r/EmulationStation,dimistor/EmulationStation,hdo/EmulationStation,Herdinger/EmulationStation,asmorgan24/EmulationStation-Marketplace,emerrepengo/recalbox-emulationstation,joolswills/EmulationStation,tschires/emu,Spicykiwi/EmulationStation,sdt/EmulationStation,rjklawiter/ESpro,rockaddicted/recalbox-emulationstation,rjklawiter/ESpro,pimcgcd/esmod,hdo/EmulationStation,gr33k/EmulationStation,Krejza9/EmulationStation-sdlmixer,recalbox/recalbox-emulationstation,jgeumlek/EmulationStation-tweaked,jrassa/EmulationStation,joolswills/EmulationStation,asmorgan24/EmulationStation-Marketplace,hdo/jukeboxV3FrontEnd,mgoulartBR/retrobox-emulationstation,MisterTea/EmulationStation,hevey/EmulationStation,Black3v3r/EmulationStation,tschires/emu,cuhsat/EmulationStation,joolswills/EmulationStation,MisterTea/EmulationStation,larrykoubiak/EmulationStation,cavedude00/EmulationStation,MisterTea/EmulationStation,cuhsat/EmulationStation,digitalLumberjack/recalbox-emulationstation,Spicykiwi/EmulationStation,dimistor/EmulationStation,mgoulartBR/retrobox-emulationstation,tbhova/EmulationStation,emerrepengo/recalbox-emulationstation,dimistor/EmulationStation,cavedude00/EmulationStation,hdo/jukeboxV3FrontEnd,digitalLumberjack/recalbox-emulationstation,cuhsat/EmulationStation,asmorgan24/EmulationStation-Marketplace,hdo/jukeboxV3FrontEnd,zigurana/EmulationStation,Krejza9/EmulationStation-sdlmixer,hevey/EmulationStation,igungor/recalbox-emulationstation,pmoran13800/recalbox-emulationstation,igungor/recalbox-emulationstation,RobLoach/EmulationStation,rockaddicted/recalbox-emulationstation,digitalLumberjack/recalbox-emulationstation