Error handler in staggered Walk() (fixes #718)
Error handler in staggered Walk() (fixes #718)

arkhi/syncthing,tenebreux/syncthing,mateon1/syncthing,wweich/syncthing,krig/syncthing,wweich/syncthing,Zillode/syncthing,roth1002/syncthing,syncthing/syncthing,modulexcite/syncthing,ZdenekBrichacek/syncthing,itscaro/syncthing,jbfavre/syncthing,rumpelsepp/syncthing,kralo/syncthing,gillisig/syncthing,beni55/syncthing,kattunga/syncthing,kluppy/syncthing,josephyzhou/syncthing,TheBigBear/syncthing,jryans/syncthing,ZdenekBrichacek/syncthing,nrm21/syncthing,mateon1/syncthing,norgeous/syncthing,rumpelsepp/syncthing,michalliu/whale,Zillode/syncthing,modulexcite/syncthing,alex2108/syncthing,imsodin/syncthing,cherylquirion/syncthing,TheBigBear/syncthing,kozec/syncthing,YtvwlD/syncthing,indradhanush/syncthing,plouj/syncthing,josephyzhou/syncthing,nrm21/syncthing,ralder/syncthing,lkwg82/syncthing,michalliu/whale,syncthing/syncthing,josephyzhou/syncthing,manveru/syncthing,atyenoria/syncthing,uok/syncthing,plouj/syncthing,krig/syncthing,kattunga/syncthing,AudriusButkevicius/syncthing,norgeous/syncthing,flyzjhz/syncthing,letiemble/syncthing,wsgcsysadmin/syncthing,danieldc/syncthing,flyzjhz/syncthing,kamadak/syncthing,trojanspike/syncthing,burkemw3/syncthing,xduugu/syncthing,canton7/syncthing,jryans/syncthing,gillisig/syncthing,trojanspike/syncthing,ProactiveServices/syncthing,kc1212/syncthing,ZdenekBrichacek/syncthing,jbfavre/syncthing,modulexcite/syncthing,wsgcsysadmin/syncthing,gillisig/syncthing,kozec/syncthing,danieldc/syncthing,AudriusButkevicius/syncthing,michalliu/whale,indradhanush/syncthing,guerrerocarlos/syncthing,abhishekgahlot/syncthing,butlife/syncthing,abhishekgahlot/syncthing,alex2108/syncthing,burkemw3/syncthing,bigscoop/syncthing,syncthing/syncthing,brgmnn/syncthing,roth1002/syncthing,kralo/syncthing,tenebreux/syncthing,toddleish/syncthing,jgke/syncthing,kc1212/syncthing,mcanthony/syncthing,butlife/syncthing,bigscoop/syncthing,kozec/syncthing,AudriusButkevicius/syncthing,michalliu/whale,ProactiveServices/syncthing,wsgcsysadmin/syncthing,bigscoop/syncthing,tenebreux/syncthing,itscaro/syncthing,Zillode/syncthing,guerrerocarlos/syncthing,pembo210/syncthing,toddleish/syncthing,norgeous/syncthing,buinsky/syncthing,printedheart/syncthing,nrm21/syncthing,ralder/syncthing,brgmnn/syncthing,MinFu/syncthing,le9i0nx/syncthing,jemmy655/syncthing,itscaro/syncthing,kozec/syncthing,alex2108/syncthing,kattunga/syncthing,arkhi/syncthing,buinsky/syncthing,MinFu/syncthing,cherylquirion/syncthing,toddleish/syncthing,pembo210/syncthing,jbfavre/syncthing,rumpelsepp/syncthing,canton7/syncthing,le9i0nx/syncthing,letiemble/syncthing,plouj/syncthing,roth1002/syncthing,mateon1/syncthing,jryans/syncthing,pembo210/syncthing,printedheart/syncthing,burkemw3/syncthing,syncthing/syncthing,wweich/syncthing,kamadak/syncthing,beni55/syncthing,canton7/syncthing,kamadak/syncthing,xduugu/syncthing,kluppy/syncthing,Kudalufi/syncthing,indradhanush/syncthing,makeTaller/syncthing,letiemble/syncthing,flyzjhz/syncthing,MinFu/syncthing,imsodin/syncthing,syncthing/syncthing,MinFu/syncthing,jgke/syncthing,guerrerocarlos/syncthing,trojanspike/syncthing,trojanspike/syncthing,jgke/syncthing,josephyzhou/syncthing,tenebreux/syncthing,brgmnn/syncthing,syncthing/syncthing,jemmy655/syncthing,manveru/syncthing,kc1212/syncthing,ProactiveServices/syncthing,Kudalufi/syncthing,pembo210/syncthing,arkhi/syncthing,manveru/syncthing,jryans/syncthing,atyenoria/syncthing,manveru/syncthing,xduugu/syncthing,wweich/syncthing,guerrerocarlos/syncthing,printedheart/syncthing,gillisig/syncthing,imsodin/syncthing,arkhi/syncthing,imsodin/syncthing,kattunga/syncthing,Kudalufi/syncthing,abhishekgahlot/syncthing,buinsky/syncthing,modulexcite/syncthing,kluppy/syncthing,roth1002/syncthing,TheBigBear/syncthing,danieldc/syncthing,butlife/syncthing,uok/syncthing,itscaro/syncthing,makeTaller/syncthing,indradhanush/syncthing,rumpelsepp/syncthing,makeTaller/syncthing,atyenoria/syncthing,uok/syncthing,letiemble/syncthing,lkwg82/syncthing,kluppy/syncthing,alex2108/syncthing,ZdenekBrichacek/syncthing,danieldc/syncthing,makeTaller/syncthing,buinsky/syncthing,le9i0nx/syncthing,flyzjhz/syncthing,ralder/syncthing,printedheart/syncthing,kamadak/syncthing,jemmy655/syncthing,cherylquirion/syncthing,kc1212/syncthing,jemmy655/syncthing,beni55/syncthing,krig/syncthing,jbfavre/syncthing,kralo/syncthing,Zillode/syncthing,brgmnn/syncthing,krig/syncthing,atyenoria/syncthing,toddleish/syncthing,jgke/syncthing,AudriusButkevicius/syncthing,imsodin/syncthing,canton7/syncthing,abhishekgahlot/syncthing,ralder/syncthing,YtvwlD/syncthing,TheBigBear/syncthing,beni55/syncthing,norgeous/syncthing,le9i0nx/syncthing,mcanthony/syncthing,cherylquirion/syncthing,xduugu/syncthing,burkemw3/syncthing,mcanthony/syncthing,ProactiveServices/syncthing,YtvwlD/syncthing,uok/syncthing,Kudalufi/syncthing,YtvwlD/syncthing,bigscoop/syncthing,nrm21/syncthing,wsgcsysadmin/syncthing,mateon1/syncthing,lkwg82/syncthing,plouj/syncthing,mcanthony/syncthing,butlife/syncthing,kralo/syncthing,lkwg82/syncthing