From eceee7b98ddfcaaca9ba7cef6ed52ba016a7bf97 Mon Sep 17 00:00:00 2001
From: Erik Stel <erik.stel@gmail.com>
Date: Thu, 5 May 2016 11:45:35 +0200
Subject: [PATCH] Fixed bbox for polyline

---
 cairosvg/bounding_box.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cairosvg/bounding_box.py b/cairosvg/bounding_box.py
index a355028f..d3a38016 100644
--- a/cairosvg/bounding_box.py
+++ b/cairosvg/bounding_box.py
@@ -85,7 +85,7 @@ def bounding_box_polyline(surface, node):
     bounding_box = EMPTY_BOUNDING_BOX
     points = []
     normalized_points = normalize(node.get('points', ''))
-    while points:
+    while normalized_points:
         x, y, normalized_points = point(surface, normalized_points)
         points.append((x, y))
     return extend_bounding_box(bounding_box, points)