fix bug in step_region_copy
fix bug in step_region_copy

timsutton/packer,grubernaut/packer,mitchellh/packer,pecigonzalo/packer,grubernaut/packer,grubernaut/packer,dave2/packer,timsutton/packer,rnaveiras/packer,pecigonzalo/packer,pecigonzalo/packer,pecigonzalo/packer,hashicorp/packer,grubernaut/packer,hashicorp/packer,paulmey/packer,rnaveiras/packer,hashicorp/packer,mitchellh/packer,dave2/packer,dave2/packer,grubernaut/packer,dave2/packer,rnaveiras/packer,timsutton/packer,mitchellh/packer,paulmey/packer,timsutton/packer,grubernaut/packer,rnaveiras/packer,ricardclau/packer,ricardclau/packer,timsutton/packer,ricardclau/packer,paulmey/packer,ricardclau/packer,mitchellh/packer,dave2/packer,mitchellh/packer,timsutton/packer,paulmey/packer,ricardclau/packer,ricardclau/packer,paulmey/packer,rnaveiras/packer,hashicorp/packer,dave2/packer,paulmey/packer,rnaveiras/packer