From cdc63767192a101903a24420605dee3d29f6b280 Mon Sep 17 00:00:00 2001
From: Dane Springmeyer <dane@dbsgeo.com>
Date: Fri, 16 Mar 2012 14:49:56 -0700
Subject: [PATCH] be explicit about zero-division protection

---
 include/mapnik/ctrans.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/mapnik/ctrans.hpp b/include/mapnik/ctrans.hpp
index 014073906..31c62f391 100644
--- a/include/mapnik/ctrans.hpp
+++ b/include/mapnik/ctrans.hpp
@@ -397,9 +397,9 @@ public:
           sx_(1.0),
           sy_(1.0)
     {
-        if (extent_.width())
+        if (extent_.width() > 0)
             sx_ = static_cast<double>(width_) / extent_.width();
-        if (extent_.height())
+        if (extent_.height() > 0)
             sy_ = static_cast<double>(height_) / extent_.height();
     }