client: report entry packing in error message

Change-Id: If33a942e804a0c054e879e95da74bbcdaa1926c9
Reviewed-on: https://upspin-review.googlesource.com/18640
Reviewed-by: Eric Grosse <grosse@gmail.com>
diff --git a/client/client.go b/client/client.go
index ed5da5f..b082513 100644
--- a/client/client.go
+++ b/client/client.go
@@ -777,7 +777,7 @@
 
 	packer := pack.Lookup(entry.Packing)
 	if packer == nil {
-		return nil, errors.E(op, oldName, errors.Invalid, errors.Errorf("unrecognized Packing %d", c.config.Packing()))
+		return nil, errors.E(op, oldName, errors.Invalid, errors.Errorf("unrecognized Packing %d", entry.Packing))
 	}
 	if access.IsAccessControlFile(newName) {
 		return nil, errors.E(op, newName, errors.Invalid, "Access or Group files cannot be renamed")