no naked returns in go; fix auth v3 unit tests
diff --git a/openstack/blockstorage/v1/snapshots/requests.go b/openstack/blockstorage/v1/snapshots/requests.go
index 5c05f9b..cb9d0d0 100644
--- a/openstack/blockstorage/v1/snapshots/requests.go
+++ b/openstack/blockstorage/v1/snapshots/requests.go
@@ -40,17 +40,20 @@
 	_, r.Err = client.Post(createURL(client), b, &r.Body, &gophercloud.RequestOpts{
 		OkCodes: []int{200, 201},
 	})
+	return
 }
 
 // Delete will delete the existing Snapshot with the provided ID.
 func Delete(client *gophercloud.ServiceClient, id string) (r DeleteResult) {
 	_, r.Err = client.Delete(deleteURL(client, id), nil)
+	return
 }
 
 // Get retrieves the Snapshot with the provided ID. To extract the Snapshot
 // object from the response, call the Extract method on the GetResult.
 func Get(client *gophercloud.ServiceClient, id string) (r GetResult) {
 	_, r.Err = client.Get(getURL(client, id), &r.Body, nil)
+	return
 }
 
 // ListOptsBuilder allows extensions to add additional parameters to the List
@@ -120,6 +123,7 @@
 	_, r.Err = client.Put(updateMetadataURL(client, id), b, &r.Body, &gophercloud.RequestOpts{
 		OkCodes: []int{200},
 	})
+	return
 }
 
 // IDFromName is a convienience function that returns a snapshot's ID given its name.