From 8b5fb877e7bd1bce47b666d162a08f35fdc8dc41 Mon Sep 17 00:00:00 2001
From: Florian Festi <florian@festi.info>
Date: Sun, 12 Feb 2023 17:43:20 +0100
Subject: [PATCH] polygonWalls: don't error out on empty borders list

---
 boxes/__init__.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/boxes/__init__.py b/boxes/__init__.py
index 81692e1..daf99d0 100755
--- a/boxes/__init__.py
+++ b/boxes/__init__.py
@@ -2720,6 +2720,9 @@ class Boxes:
 
     @restore
     def polygonWalls(self, borders, h, bottom="F", top="F", symmetrical=True):
+        if not borders:
+            return
+
         bottom = self.edges.get(bottom, bottom)
         top = self.edges.get(top, top)
         t = self.thickness # XXX edge.margin()