From a85347134ea97e1c87e99b27de53059f8cf9ef43 Mon Sep 17 00:00:00 2001
From: Jaime van Kessel <nallath@gmail.com>
Date: Mon, 24 Aug 2015 10:34:40 +0200
Subject: [PATCH] Added check to see if requested layer is in the list.

contributes to #193
---
 plugins/CuraEngineBackend/LayerData.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/plugins/CuraEngineBackend/LayerData.py b/plugins/CuraEngineBackend/LayerData.py
index c793c17504..597839ea39 100644
--- a/plugins/CuraEngineBackend/LayerData.py
+++ b/plugins/CuraEngineBackend/LayerData.py
@@ -28,7 +28,8 @@ class LayerData(MeshData):
         self._layers[layer].polygons.append(p)
 
     def getLayer(self, layer):
-        return self._layers[layer]
+        if layer in self._layers:
+            return self._layers[layer]
 
     def getLayers(self):
         return self._layers