plugins.smacks: Don't warn about zero stanzas acked It's only if the count somehow goes backwards that something is really wrong. An ack for zero stanzas is fine and we don't need to do anything.

author: Kim Alvefur <zash@zash.se>
date: Thu, 10 Jun 2021 11:58:23 +0200
parent: 408:635cbd979d7b
child: 446:62fb547bd31a
--- a/plugins/smacks.lua	Sun Jun 06 16:43:36 2021 +0200
+++ b/plugins/smacks.lua	Thu Jun 10 11:58:23 2021 +0200
@@ -80,7 +80,7 @@
 				end
 				stream:debug("Received ack: New ack: "..new_ack.." Last ack: "..last_ack.." Unacked stanzas now: "..#outgoing_queue.." (was "..old_unacked..")");
 				last_ack = new_ack;
-			else
+			elseif new_ack < last_ack then
 				stream:warn("Received bad ack for "..new_ack.." when last ack was "..last_ack);
 			end
 		elseif stanza.name == "enabled" then