From 86077105b12c8187c8ef28c3dbb638db49a71de4 Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Thu, 3 May 2018 13:14:21 +0200
Subject: [PATCH] fixed the crash with four... geometries (appeared on OSX)

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

diff --git a/heptagon.cpp b/heptagon.cpp
index 599db911..304d836b 100644
--- a/heptagon.cpp
+++ b/heptagon.cpp
@@ -113,7 +113,7 @@ heptagon *buildHeptagon(heptagon *parent, int d, hstate s, int pard = 0, int fix
         if(h1->distance <= h->move[0]->distance)
           h->distance = h->move[0]->distance+1;
         }
-      if(h->spin(0) == S7-1)
+      if(h->spin(0) == S7-1 && h->move[0]->distance != 0)
         h->distance = min(
           h->move[0]->move[0]->distance + 2,
           createStep(h, S7-1)->distance + 1