Fix backend status out of bounds
Fix backend status out of bounds

kubernetes/ingress-nginx,chentao1596/ingress,kubernetes/ingress-nginx,winfield-chen-hs/ingress,canhnt/ingress,kubernetes/ingress-nginx,jcmoraisjr/ingress,nicksardo/ingress,aledbf/ingress-nginx,nicksardo/ingress,nicksardo/ingress,caicloud/ingress,chentao1596/ingress,coryfklein/ingress,danielqsj/ingress,caiyixiang/ingress,canhnt/ingress,danielqsj/ingress,caicloud/ingress,nicksardo/ingress,kubernetes/ingress-gce,canhnt/ingress,coryfklein/ingress,winfield-chen-hs/ingress,canhnt/ingress,jcmoraisjr/ingress,kubernetes/ingress-gce,caicloud/ingress,aledbf/ingress-nginx,kubernetes/ingress-nginx,caicloud/ingress,caiyixiang/ingress,aledbf/ingress-nginx,kubernetes/ingress-nginx,jcmoraisjr/ingress,aledbf/ingress-nginx