From a16336e9aed759873256ef900e8b88c1f5c3a689 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Laura=20Kl=C3=BCnder?= <laura@codingcatgirl.de>
Date: Fri, 10 Nov 2017 17:41:47 +0100
Subject: [PATCH] fix errors if there are no walls on a tile (or other geometry
 is empty)

---
 src/c3nav/mapdata/render/engines/svg.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/c3nav/mapdata/render/engines/svg.py b/src/c3nav/mapdata/render/engines/svg.py
index 2991101d..432eb127 100644
--- a/src/c3nav/mapdata/render/engines/svg.py
+++ b/src/c3nav/mapdata/render/engines/svg.py
@@ -216,6 +216,9 @@ class SVGEngine(RenderEngine):
                       altitude=None, height=None, shape_cache_key=None):
         geometry = self.buffered_bbox.intersection(geometry.geom)
 
+        if geometry.is_empty:
+            return
+
         if fill:
             attribs = ' fill="'+(fill.color)+'"'
             if fill.opacity: