From ab750077fabc3a02b2dddb96a2d2eaf2b1d12e23 Mon Sep 17 00:00:00 2001
From: Florian Festi <florian@festi.info>
Date: Mon, 28 Aug 2017 23:10:56 +0200
Subject: [PATCH] .partsMatrix(): Do not error out for zero or negative parts
 count

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

diff --git a/boxes/__init__.py b/boxes/__init__.py
index 036357d..1cf11d3 100755
--- a/boxes/__init__.py
+++ b/boxes/__init__.py
@@ -1531,6 +1531,9 @@ class Boxes:
 
     def partsMatrix(self, n, width, move, part, *l, **kw):
 
+        if n <= 0:
+            return
+
         rows = n//width + (1 if n % width else 0)
 
         if not move: