Fix issue where, if zone members empty, Zone#kind can raise a nilClass exception
Fix issue where, if zone members empty, Zone#kind can raise a nilClass exception

This bug was introduced in @662deb2d4b15f3d2c0ea3030168c2e609e511793

locomotivapro/spree,locomotivapro/spree,TimurTarasenko/spree,reidblomquist/spree,tesserakt/clean_spree,keatonrow/spree,lyzxsc/spree,project-eutopia/spree,builtbybuffalo/spree,project-eutopia/spree,yushine/spree,codesavvy/sandbox,ckk-scratch/solidus,archSeer/spree,Boomkat/spree,progsri/spree,richardnuno/solidus,quentinuys/spree,sideci-sample/sideci-sample-spree,yomishra/pce,athal7/solidus,vulk/spree,surfdome/spree,mleglise/spree,rajeevriitm/spree,Migweld/spree,azranel/spree,camelmasa/spree,hoanghiep90/spree,dafontaine/spree,siddharth28/spree,CiscoCloud/spree,vinsol/spree,vinayvinsol/spree,archSeer/spree,ramkumar-kr/spree,judaro13/spree-fork,alvinjean/spree,pjmj777/spree,softr8/spree,progsri/spree,gregoryrikson/spree-sample,priyank-gupta/spree,grzlus/spree,Senjai/spree,karlitxo/spree,tomash/spree,trigrass2/spree,APohio/spree,ahmetabdi/spree,Lostmyname/spree,StemboltHQ/spree,wolfieorama/spree,welitonfreitas/spree,agient/agientstorefront,jordan-brough/solidus,njerrywerry/spree,sliaquat/spree,scottcrawford03/solidus,jordan-brough/solidus,project-eutopia/spree,builtbybuffalo/spree,degica/spree,rajeevriitm/spree,derekluo/spree,abhishekjain16/spree,jsurdilla/solidus,miyazawatomoka/spree,devilcoders/solidus,pervino/solidus,DynamoMTL/spree,ckk-scratch/solidus,robodisco/spree,radarseesradar/spree,ujai/spree,RatioClothing/spree,LBRapid/spree,madetech/spree,jsurdilla/solidus,tailic/spree,SadTreeFriends/spree,shioyama/spree,alepore/spree,caiqinghua/spree,JDutil/spree,berkes/spree,CJMrozek/spree,dotandbo/spree,Ropeney/spree,karlitxo/spree,jparr/spree,JuandGirald/spree,calvinl/spree,richardnuno/solidus,azclick/spree,grzlus/spree,alejandromangione/spree,delphsoft/spree-store-ballchair,wolfieorama/spree,CJMrozek/spree,fahidnasir/spree,omarsar/spree,alejandromangione/spree,fahidnasir/spree,Engeltj/spree,athal7/solidus,lsirivong/spree,Senjai/solidus,Hates/spree,Antdesk/karpal-spree,tancnle/spree,joanblake/spree,dotandbo/spree,jasonfb/spree,dandanwei/spree,AgilTec/spree,useiichi/spree,sunny2601/spree,jimblesm/spree,kitwalker12/spree,CiscoCloud/spree,degica/spree,ayb/spree,dotandbo/spree,bonobos/solidus,lyzxsc/spree,berkes/spree,shekibobo/spree,alvinjean/spree,yiqing95/spree,keatonrow/spree,ahmetabdi/spree,zaeznet/spree,piousbox/spree,jspizziri/spree,dotandbo/spree,maybii/spree,derekluo/spree,jimblesm/spree,miyazawatomoka/spree,jordan-brough/spree,rakibulislam/spree,alejandromangione/spree,tesserakt/clean_spree,tailic/spree,jsurdilla/solidus,assembledbrands/spree,AgilTec/spree,vulk/spree,Mayvenn/spree,grzlus/solidus,Ropeney/spree,robodisco/spree,vulk/spree,yushine/spree,lzcabrera/spree-1-3-stable,pulkit21/spree,omarsar/spree,madetech/spree,devilcoders/solidus,zamiang/spree,volpejoaquin/spree,Arpsara/solidus,nooysters/spree,sideci-sample/sideci-sample-spree,wolfieorama/spree,Arpsara/solidus,karlitxo/spree,JDutil/spree,reinaris/spree,JDutil/spree,jimblesm/spree,builtbybuffalo/spree,delphsoft/spree-store-ballchair,vmatekole/spree,softr8/spree,beni55/spree,rajeevriitm/spree,rakibulislam/spree,agient/agientstorefront,Nevensoft/spree,azclick/spree,odk211/spree,reinaris/spree,radarseesradar/spree,progsri/spree,grzlus/solidus,rbngzlv/spree,JDutil/spree,kewaunited/spree,softr8/spree,ahmetabdi/spree,codesavvy/sandbox,njerrywerry/spree,locomotivapro/spree,surfdome/spree,knuepwebdev/FloatTubeRodHolders,tancnle/spree,moneyspyder/spree,delphsoft/spree-store-ballchair,softr8/spree,Senjai/spree,azclick/spree,volpejoaquin/spree,karlitxo/spree,jaspreet21anand/spree,thogg4/spree,tancnle/spree,jhawthorn/spree,tomash/spree,rbngzlv/spree,Senjai/spree,bonobos/solidus,kewaunited/spree,Hawaiideveloper/shoppingcart,brchristian/spree,StemboltHQ/spree,omarsar/spree,cutefrank/spree,TrialGuides/spree,Hates/spree,quentinuys/spree,lzcabrera/spree-1-3-stable,pulkit21/spree,nooysters/spree,dafontaine/spree,edgward/spree,CiscoCloud/spree,codesavvy/sandbox,Nevensoft/spree,firman/spree,TrialGuides/spree,Kagetsuki/spree,lsirivong/spree,dafontaine/spree,thogg4/spree,maybii/spree,CJMrozek/spree,radarseesradar/spree,DarkoP/spree,cutefrank/spree,mleglise/spree,Senjai/solidus,azclick/spree,vcavallo/spree,hoanghiep90/spree,mindvolt/spree,SadTreeFriends/spree,pjmj777/spree,tancnle/spree,judaro13/spree-fork,joanblake/spree,vcavallo/spree,biagidp/spree,Kagetsuki/spree,odk211/spree,bjornlinder/Spree,jimblesm/spree,moneyspyder/spree,ahmetabdi/spree,grzlus/solidus,APohio/spree,Machpowersystems/spree_mach,forkata/solidus,bjornlinder/Spree,agient/agientstorefront,freerunningtech/spree,alvinjean/spree,odk211/spree,LBRapid/spree,sliaquat/spree,zamiang/spree,knuepwebdev/FloatTubeRodHolders,TimurTarasenko/spree,maybii/spree,Mayvenn/spree,pervino/solidus,Engeltj/spree,lsirivong/spree,lsirivong/solidus,jeffboulet/spree,adaddeo/spree,zaeznet/spree,pjmj777/spree,jaspreet21anand/spree,NerdsvilleCEO/spree,Migweld/spree,grzlus/spree,yiqing95/spree,Senjai/solidus,lsirivong/spree,JuandGirald/spree,grzlus/solidus,woboinc/spree,edgward/spree,useiichi/spree,groundctrl/spree,bonobos/solidus,abhishekjain16/spree,caiqinghua/spree,NerdsvilleCEO/spree,jhawthorn/spree,jasonfb/spree,Machpowersystems/spree_mach,APohio/spree,moneyspyder/spree,jsurdilla/solidus,scottcrawford03/solidus,sunny2601/spree,xuewenfei/solidus,derekluo/spree,lzcabrera/spree-1-3-stable,ayb/spree,jhawthorn/spree,sliaquat/spree,PhoenixTeam/spree_phoenix,firman/spree,priyank-gupta/spree,wolfieorama/spree,dandanwei/spree,AgilTec/spree,vinayvinsol/spree,pervino/solidus,welitonfreitas/spree,judaro13/spree-fork,useiichi/spree,keatonrow/spree,beni55/spree,net2b/spree,watg/spree,carlesjove/spree,jparr/spree,groundctrl/spree,HealthWave/spree,zaeznet/spree,joanblake/spree,dandanwei/spree,Engeltj/spree,DynamoMTL/spree,net2b/spree,athal7/solidus,devilcoders/solidus,hifly/spree,gautamsawhney/spree,progsri/spree,pervino/spree,TrialGuides/spree,quentinuys/spree,adaddeo/spree,bricesanchez/spree,keatonrow/spree,imella/spree,dandanwei/spree,surfdome/spree,miyazawatomoka/spree,DynamoMTL/spree,assembledbrands/spree,vcavallo/spree,CJMrozek/spree,jeffboulet/spree,zamiang/spree,Senjai/solidus,tomash/spree,SadTreeFriends/spree,shekibobo/spree,maybii/spree,njerrywerry/spree,Hates/spree,pulkit21/spree,carlesjove/spree,tesserakt/clean_spree,beni55/spree,bonobos/solidus,mindvolt/spree,jspizziri/spree,Kagetsuki/spree,urimikhli/spree,Mayvenn/spree,brchristian/spree,freerunningtech/spree,watg/spree,patdec/spree,codesavvy/sandbox,alepore/spree,lyzxsc/spree,ujai/spree,vcavallo/spree,DarkoP/spree,Kagetsuki/spree,vinsol/spree,welitonfreitas/spree,TimurTarasenko/spree,orenf/spree,pulkit21/spree,RatioClothing/spree,scottcrawford03/solidus,vulk/spree,shioyama/spree,sfcgeorge/spree,Machpowersystems/spree_mach,beni55/spree,net2b/spree,groundctrl/spree,Nevensoft/spree,xuewenfei/solidus,jeffboulet/spree,jspizziri/spree,alvinjean/spree,archSeer/spree,pervino/solidus,ckk-scratch/solidus,joanblake/spree,Migweld/spree,derekluo/spree,rbngzlv/spree,lyzxsc/spree,StemboltHQ/spree,tailic/spree,brchristian/spree,mindvolt/spree,yomishra/pce,FadliKun/spree,vmatekole/spree,freerunningtech/spree,camelmasa/spree,Engeltj/spree,hoanghiep90/spree,jordan-brough/solidus,gregoryrikson/spree-sample,patdec/spree,ayb/spree,PhoenixTeam/spree_phoenix,vinsol/spree,gregoryrikson/spree-sample,KMikhaylovCTG/spree,Lostmyname/spree,jordan-brough/spree,fahidnasir/spree,gautamsawhney/spree,Arpsara/solidus,kewaunited/spree,abhishekjain16/spree,berkes/spree,jspizziri/spree,calvinl/spree,Hawaiideveloper/shoppingcart,APohio/spree,azranel/spree,surfdome/spree,Ropeney/spree,hifly/spree,orenf/spree,xuewenfei/solidus,DarkoP/spree,richardnuno/solidus,Migweld/spree,lsirivong/solidus,ayb/spree,richardnuno/solidus,builtbybuffalo/spree,kewaunited/spree,kitwalker12/spree,trigrass2/spree,jaspreet21anand/spree,piousbox/spree,siddharth28/spree,jasonfb/spree,ramkumar-kr/spree,ujai/spree,yushine/spree,urimikhli/spree,forkata/solidus,delphsoft/spree-store-ballchair,hifly/spree,firman/spree,knuepwebdev/FloatTubeRodHolders,fahidnasir/spree,TimurTarasenko/spree,archSeer/spree,JuandGirald/spree,pervino/spree,forkata/solidus,RatioClothing/spree,siddharth28/spree,NerdsvilleCEO/spree,lsirivong/solidus,HealthWave/spree,caiqinghua/spree,camelmasa/spree,imella/spree,AgilTec/spree,scottcrawford03/solidus,azranel/spree,CiscoCloud/spree,sfcgeorge/spree,agient/agientstorefront,jasonfb/spree,gautamsawhney/spree,Hawaiideveloper/shoppingcart,Lostmyname/spree,yiqing95/spree,orenf/spree,shaywood2/spree,jparr/spree,DarkoP/spree,camelmasa/spree,PhoenixTeam/spree_phoenix,Antdesk/karpal-spree,bricesanchez/spree,welitonfreitas/spree,jaspreet21anand/spree,piousbox/spree,raow/spree,patdec/spree,rakibulislam/spree,njerrywerry/spree,groundctrl/spree,quentinuys/spree,madetech/spree,carlesjove/spree,devilcoders/solidus,Boomkat/spree,biagidp/spree,PhoenixTeam/spree_phoenix,vmatekole/spree,Lostmyname/spree,nooysters/spree,sliaquat/spree,shaywood2/spree,madetech/spree,calvinl/spree,rakibulislam/spree,volpejoaquin/spree,KMikhaylovCTG/spree,berkes/spree,yiqing95/spree,pervino/spree,reinaris/spree,priyank-gupta/spree,rbngzlv/spree,Nevensoft/spree,assembledbrands/spree,orenf/spree,yushine/spree,omarsar/spree,bjornlinder/Spree,zamiang/spree,Arpsara/solidus,nooysters/spree,tesserakt/clean_spree,project-eutopia/spree,Boomkat/spree,radarseesradar/spree,pervino/spree,reidblomquist/spree,mleglise/spree,Hawaiideveloper/shoppingcart,odk211/spree,thogg4/spree,bricesanchez/spree,sunny2601/spree,forkata/solidus,xuewenfei/solidus,gautamsawhney/spree,carlesjove/spree,raow/spree,jordan-brough/solidus,abhishekjain16/spree,SadTreeFriends/spree,ramkumar-kr/spree,raow/spree,vinsol/spree,yomishra/pce,Antdesk/karpal-spree,caiqinghua/spree,hoanghiep90/spree,sunny2601/spree,cutefrank/spree,net2b/spree,Hates/spree,moneyspyder/spree,HealthWave/spree,woboinc/spree,useiichi/spree,FadliKun/spree,hifly/spree,trigrass2/spree,calvinl/spree,siddharth28/spree,jeffboulet/spree,degica/spree,TrialGuides/spree,sideci-sample/sideci-sample-spree,JuandGirald/spree,imella/spree,DynamoMTL/spree,vmatekole/spree,robodisco/spree,mindvolt/spree,zaeznet/spree,adaddeo/spree,NerdsvilleCEO/spree,miyazawatomoka/spree,priyank-gupta/spree,KMikhaylovCTG/spree,dafontaine/spree,KMikhaylovCTG/spree,FadliKun/spree,FadliKun/spree,rajeevriitm/spree,ckk-scratch/solidus,gregoryrikson/spree-sample,alepore/spree,woboinc/spree,Mayvenn/spree,shaywood2/spree,kitwalker12/spree,vinayvinsol/spree,watg/spree,urimikhli/spree,tomash/spree,volpejoaquin/spree,shaywood2/spree,raow/spree,firman/spree,jparr/spree,athal7/solidus,robodisco/spree,LBRapid/spree,thogg4/spree,lsirivong/solidus,biagidp/spree,reinaris/spree,cutefrank/spree,edgward/spree,Ropeney/spree,grzlus/spree,reidblomquist/spree,shioyama/spree,ramkumar-kr/spree,adaddeo/spree,shekibobo/spree,azranel/spree,trigrass2/spree,locomotivapro/spree,alejandromangione/spree,reidblomquist/spree,Boomkat/spree,sfcgeorge/spree,edgward/spree,mleglise/spree,sfcgeorge/spree,shekibobo/spree,vinayvinsol/spree,piousbox/spree,patdec/spree,brchristian/spree,jordan-brough/spree