QImage::scaled() returns a hard copy when new size equals old size.

One would assume that Qt uses implicit sharing so that in the following example:

QImage image(100,100,QImage::Format_RGB32);
image = image.scaled(100,100);

the second line should be a no-op.

This is easily fixed in QImage::scaled(), where

if (newSize == size())
return copy();

should be

if (newSize == size())
return*this;