From a867646dfd9b4b0493c15db222fcda44d753fa75 Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Wed, 3 Dec 2014 16:30:35 -0800
Subject: [PATCH] Don't introduce bogus geometries in clipped-away features.

---
 geometry.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/geometry.cc b/geometry.cc
index daecdce..14aa079 100644
--- a/geometry.cc
+++ b/geometry.cc
@@ -548,6 +548,10 @@ drawvec simplify_lines(drawvec &geom, int z, int detail) {
 drawvec reorder_lines(drawvec &geom) {
 	// Only reorder simple linestrings with a single moveto
 
+	if (geom.size() == 0) {
+		return geom;
+	}
+
 	unsigned i;
 	for (i = 0; i < geom.size(); i++) {
 		if (geom[i].op == VT_MOVETO) {