histogramgenerator.cpp: check for division by zero

Fixes Coverity CID 709284: Division or modulo by zero (DIVIDE_BY_ZERO)
Division by expression "byteCount >> 7" which may be zero has undefined behavior
 87    const float scaling = (float)partH/(byteCount >> 7);

diff --git a/src/colorcorrection/histogramgenerator.cpp b/src/colorcorrection/histogramgenerator.cpp
index 456aad6baa27917e9e98c7f1e35ccbac82c22a5a..2681c504619ecc9d081a6a4300927a381051fcd4 100644 (file)
--- a/src/colorcorrection/histogramgenerator.cpp
+++ b/src/colorcorrection/histogramgenerator.cpp
@@ -84,7 +84,10 @@ QImage HistogramGenerator::calculateHistogram(const QSize &paradeSize, const QIm
 
     const int d = 20; // Distance for text
     const int partH = (wh-nParts*d)/nParts;
-    const float scaling = (float)partH/(byteCount >> 7);
+    float scaling = 0;
+    int div = byteCount >> 7;
+    if ( div > 0 )
+        scaling = (float)partH/(byteCount >> 7);
     const int dist = 40;
 
     int wy = 0; // Drawing position