From 76d0538b3cb6ebb731415a5c2a800cedcf810ecf Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Wed, 18 Jul 2018 00:49:13 +0200
Subject: [PATCH] added const

---
 irregular.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/irregular.cpp b/irregular.cpp
index 8d6ebc49..a5aa6f72 100644
--- a/irregular.cpp
+++ b/irregular.cpp
@@ -157,7 +157,7 @@ bool step(int delta) {
     
     case 2: {
 
-      sort(cells.begin(), cells.end(), [] (cellinfo &s1, cellinfo &s2) { return hdist0(s1.p) < hdist0(s2.p); });
+      sort(cells.begin(), cells.end(), [] (const cellinfo &s1, const cellinfo &s2) { return hdist0(s1.p) < hdist0(s2.p); });
       make_cells_of_heptagon();
 
       edgelens.clear();