From 945a1ba0c4593218729c73d2b4baf4c1b0fd9dcc Mon Sep 17 00:00:00 2001
From: Mikko Rapeli <mikko.rapeli@iki.fi>
Date: Fri, 10 Aug 2012 14:17:17 +0200
Subject: [PATCH] thumbnailer/westleypreview.cpp: check for division by zero

Fixes Coverity CID 709288: Division or modulo by zero (DIVIDE_BY_ZERO)
Division by expression "STEPS" which may be zero has undefined behavior
139    avg=avg/STEPS;
...
150    return delta / STEPS;
---
 thumbnailer/westleypreview.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/thumbnailer/westleypreview.cpp b/thumbnailer/westleypreview.cpp
index 8512b60f..91132787 100644
--- a/thumbnailer/westleypreview.cpp
+++ b/thumbnailer/westleypreview.cpp
@@ -123,6 +123,7 @@ uint MltPreview::imageVariance(QImage image)
     uint delta = 0;
     uint avg = 0;
     uint bytes = image.numBytes();
+    if (bytes == 0) return 0;
     uint STEPS = bytes / 2;
     QVarLengthArray<uchar> pivot(STEPS);
     kDebug(DBG_AREA) << "Using " << STEPS << " steps\n";
-- 
2.39.2