coverity#1222229 Division or modulo by zero

Change-Id: I97fd23d19a96665b91154ed260c677f0f76fee47

1 files changed, 10 insertions, 3 deletions

diff --git a/vcl/source/bitmap/bitmapscalesuper.cxx b/vcl/source/bitmap/bitmapscalesuper.cxx
index bc4461344a70..a7a263f0db75 100644
--- a/vcl/source/bitmap/bitmapscalesuper.cxx
+++ b/vcl/source/bitmap/bitmapscalesuper.cxx
@@ -372,9 +372,16 @@ void scalePallete8bit2(BitmapReadAccess* pAcc, BitmapWriteAccess* pWAcc,
                 else if ( nLineRange == i )
                     nWeightY = pMapFY[ nBottom ];
 
-                nSumB += nWeightY * ( nSumRowB / nTotalWeightX );
-                nSumG += nWeightY * ( nSumRowG / nTotalWeightX );
-                nSumR += nWeightY * ( nSumRowR / nTotalWeightX );
+                if (nTotalWeightX)
+                {
+                    nSumRowB /= nTotalWeightX;
+                    nSumRowG /= nTotalWeightX;
+                    nSumRowR /= nTotalWeightX;
+                }
+
+                nSumB += nWeightY * nSumRowB;
+                nSumG += nWeightY * nSumRowG;
+                nSumR += nWeightY * nSumRowR;
                 nTotalWeightY += nWeightY;
             }