# HG changeset patch
# User Kim Alvefur <zash@zash.se>
# Date 1530143188 -7200
# Node ID 3a095233e1782361404432a9cbe654805c45b155
# Parent  cbeb1a045eb60999f8e83d4bfc8f8b192c04eb68
mod_pubsub: Handle optional item (thanks jonasw)

The ‘item’ argument is optional, so it needs to handle it not being
included, or util.stanza will throw an error in add_child

diff -r cbeb1a045eb6 -r 3a095233e178 plugins/mod_pubsub/mod_pubsub.lua
--- a/plugins/mod_pubsub/mod_pubsub.lua	Wed Jun 27 20:06:13 2018 +0200
+++ b/plugins/mod_pubsub/mod_pubsub.lua	Thu Jun 28 01:46:28 2018 +0200
@@ -55,10 +55,13 @@
 	local message = st.message({ from = module.host, type = msg_type, id = id })
 		:tag("event", { xmlns = xmlns_pubsub_event })
 			:tag(kind, { node = node })
-				:add_child(item);
+
+	if item then
+		message:add_child(item);
+	end
 
 	-- Compose a sensible textual representation of at least Atom payloads
-	if node_obj and node_obj.config.include_body and item.tags[1] then
+	if node_obj and item and node_obj.config.include_body and item.tags[1] then
 		local payload = item.tags[1];
 		if payload.attr.xmlns == "http://www.w3.org/2005/Atom" then
 			message:reset();