embed: fix nil dereference on error to set up initial cluster
embed: fix nil dereference on error to set up initial cluster

xiang90/etcd,dannysauer/etcd,hongchaodeng/etcd,lumjjb/etcd,OyTao/etcd_learning,mickep76/etcd,fanminshi/etcd,whuwxl/etcd,glevand/coreos--etcd,insequent/etcd,whuwxl/etcd,rchicoli/etcd,sebrandon1/etcd,bdarnell/etcd,lorneli/etcd,sebrandon1/etcd,fanminshi/etcd,etcd-io/etcd,linuxcer/etcd,bdarnell/etcd,rnaveiras/etcd,joshix/etcd,jlamillan/etcd,swingbach/etcd,cockroachdb/etcd,ravigadde/etcd,YuleiXiao/etcd,mqliang/etcd,rchicoli/etcd,gyuho/etcd,purpleidea/etcd,lumjjb/etcd,tguangch/etcd,jlamillan/etcd,endocode/etcd,luxas/etcd,akauppi/etcd,vimalk78/etcd,heyitsanthony/etcd,jonboulle/etcd,visheshnp/etcd,vimalk78/etcd,heyitsanthony/etcd,glycerine/etcd,YuleiXiao/etcd,mkumatag/etcd,gyuho/etcd,CrazyJvm/etcd,jonboulle/etcd,zaphod-concur/etcd,li-ang/etcd,luxas/etcd,lorneli/etcd,nekto0n/etcd,insequent/etcd,linuxcer/etcd,ktateish/etcd,ajityagaty/etcd,qqsun8819/etcd,joshix/etcd,cockroachdb/etcd,mqliang/etcd,nekto0n/etcd,purpleidea/etcd,plasticbox/etcd,yudai/etcd,bluebreezecf/etcd,etcd-io/etcd,qqsun8819/etcd,coreos/etcd,a-robinson/etcd,glycerine/etcd,endocode/etcd,armstrongli/etcd,mkumatag/etcd,tguangch/etcd,sinsharat/etcd,li-ang/etcd,dannysauer/etcd,zaphod-concur/etcd,rnaveiras/etcd,etcd-io/etcd,visheshnp/etcd,bluebreezecf/etcd,a-robinson/etcd,swingbach/etcd,CrazyJvm/etcd,handsomesun/etcd,mkumatag/etcd,sinsharat/etcd,ajityagaty/etcd,ajityagaty/etcd,mqliang/etcd,glevand/coreos--etcd,coreos/etcd,hongchaodeng/etcd,mickep76/etcd,yudai/etcd,ravigadde/etcd,ktateish/etcd,akauppi/etcd,handsomesun/etcd,xiang90/etcd,OyTao/etcd_learning,plasticbox/etcd,armstrongli/etcd,rnaveiras/etcd