From 861d2810be065653cca3a8d98755a86ab37adba5 Mon Sep 17 00:00:00 2001
From: ademant <ademant@ademant.de>
Date: Thu, 21 Feb 2019 14:33:50 +0100
Subject: [PATCH] error in substraction function

---
 api.lua | 1 +
 1 file changed, 1 insertion(+)

diff --git a/api.lua b/api.lua
index 766867c..5a51709 100644
--- a/api.lua
+++ b/api.lua
@@ -60,6 +60,7 @@ xpfw.player_add_attribute=function(player,attrib,val)
 -- if <val> = nil then set to max value
 	local nval=val
 	local att_def=xpfw.attributes[attrib]
+	if att_def == nil then return end
 	if val==nil then
 		nval=att_def.max or 20
 	end