From bfd635dedd20175bea2289594d944dad59130878 Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Wed, 31 Mar 2021 00:52:43 +0200
Subject: [PATCH] rogueviz::kohonen:: no levellines if lv.qty < 0

---
 rogueviz/kohonen.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rogueviz/kohonen.cpp b/rogueviz/kohonen.cpp
index a24238d5..74c84d57 100644
--- a/rogueviz/kohonen.cpp
+++ b/rogueviz/kohonen.cpp
@@ -969,7 +969,7 @@ namespace levelline {
     if(levellines.size() == 0) create();
     on = false;
     for(auto& lv: levellines) {
-      if(!lv.qty) { lv.values.clear(); continue; }
+      if(!lv.qty || lv.qty < 0) { lv.values.clear(); continue; }
       on = true;
       if(!lv.modified) continue;
       lv.modified = false;