no naked returns in go; fix auth v3 unit tests
diff --git a/openstack/compute/v2/images/requests.go b/openstack/compute/v2/images/requests.go
index 9b2b985..df9f1da 100644
--- a/openstack/compute/v2/images/requests.go
+++ b/openstack/compute/v2/images/requests.go
@@ -54,11 +54,13 @@
 // Use ExtractImage() to interpret the result as an openstack Image.
 func Get(client *gophercloud.ServiceClient, id string) (r GetResult) {
 	_, r.Err = client.Get(getURL(client, id), &r.Body, nil)
+	return
 }
 
 // Delete deletes the specified image ID.
 func Delete(client *gophercloud.ServiceClient, id string) (r DeleteResult) {
 	_, r.Err = client.Delete(deleteURL(client, id), nil)
+	return
 }
 
 // IDFromName is a convienience function that returns an image's ID given its name.