add image.Delete operation
diff --git a/openstack/compute/v2/images/results.go b/openstack/compute/v2/images/results.go
index 493d511..40e814d 100644
--- a/openstack/compute/v2/images/results.go
+++ b/openstack/compute/v2/images/results.go
@@ -11,6 +11,11 @@
 	gophercloud.Result
 }
 
+// DeleteResult represents the result of an image.Delete operation.
+type DeleteResult struct {
+	gophercloud.ErrResult
+}
+
 // Extract interprets a GetResult as an Image.
 func (gr GetResult) Extract() (*Image, error) {
 	if gr.Err != nil {