From 656749de14305995d6cb6bc45dcbf03d8cb3e677 Mon Sep 17 00:00:00 2001
From: Hermann Kraus <hermr2d2@scribus.info>
Date: Fri, 23 Dec 2011 15:01:28 +0100
Subject: [PATCH] Fix unsigned underflow.

---
 src/raster_colorizer.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/raster_colorizer.cpp b/src/raster_colorizer.cpp
index 95aec3cb7..554592246 100644
--- a/src/raster_colorizer.cpp
+++ b/src/raster_colorizer.cpp
@@ -138,7 +138,7 @@ void raster_colorizer::colorize(raster_ptr const& raster,const std::map<std::str
 
 inline unsigned interpolate(unsigned start, unsigned end, float fraction)
 {
-    return static_cast<unsigned>(fraction * (end - start) + start);
+    return static_cast<unsigned>(fraction * ((float)end - (float)start) + start);
 }
 
 color raster_colorizer::get_color(float value) const {