Adding DeleteResult for rackspace.blockstorage.v1.snapshots.Delete
diff --git a/rackspace/blockstorage/v1/snapshots/results.go b/rackspace/blockstorage/v1/snapshots/results.go
index 0fab282..a43bee9 100644
--- a/rackspace/blockstorage/v1/snapshots/results.go
+++ b/rackspace/blockstorage/v1/snapshots/results.go
@@ -71,6 +71,11 @@
 	gophercloud.Result
 }
 
+// DeleteResult represents the result of a delete operation
+type DeleteResult struct {
+	os.DeleteResult
+}
+
 func commonExtract(resp interface{}, err error) (*Snapshot, error) {
 	if err != nil {
 		return nil, err