HTTPDownloader - Fix invalid error handling
HTTPDownloader - Fix invalid error handling

grubernaut/packer,youhong316/packer,ricardclau/packer,youhong316/packer,pecigonzalo/packer,pecigonzalo/packer,grubernaut/packer,grubernaut/packer,paulmey/packer,timsutton/packer,mkuzmin/packer,tb3088/packer,pecigonzalo/packer,ricardclau/packer,KohlsTechnology/packer,ricardclau/packer,paulmey/packer,rnaveiras/packer,mkuzmin/packer,tas50/packer,dave2/packer,mitchellh/packer,tas50/packer,mkuzmin/packer,dave2/packer,hashicorp/packer,tb3088/packer,rnaveiras/packer,mkuzmin/packer,mitchellh/packer,tb3088/packer,bryson/packer,youhong316/packer,tas50/packer,timsutton/packer,bryson/packer,paulmey/packer,mkuzmin/packer,tas50/packer,dave2/packer,grubernaut/packer,grubernaut/packer,hashicorp/packer,rnaveiras/packer,tb3088/packer,youhong316/packer,hashicorp/packer,ricardclau/packer,timsutton/packer,tas50/packer,tas50/packer,timsutton/packer,youhong316/packer,youhong316/packer,mkuzmin/packer,ricardclau/packer,rnaveiras/packer,paulmey/packer,KohlsTechnology/packer,dave2/packer,mitchellh/packer,mitchellh/packer,timsutton/packer,ricardclau/packer,tb3088/packer,KohlsTechnology/packer,dave2/packer,bryson/packer,bryson/packer,bryson/packer,rnaveiras/packer,dave2/packer,pecigonzalo/packer,tb3088/packer,grubernaut/packer,bryson/packer,paulmey/packer,mitchellh/packer,rnaveiras/packer,hashicorp/packer,timsutton/packer,KohlsTechnology/packer,KohlsTechnology/packer,paulmey/packer,KohlsTechnology/packer