TRIVIAL: QVideoSurfaceFormat method isValid() returns incorrect values (qvideosurfaceformat.cpp)

The method "bool QVideoSurfaceFormat::isValid () const" returns incorrect values.

If you view the code for the method (available here: http://qt.gitorious.org/qt/qt/blobs/4.7/src/multimedia/video/qvideosurfaceformat.cpp#line253 )

bool QVideoSurfaceFormat::isValid() const
{
return d->pixelFormat == QVideoFrame::Format_Invalid && d->frameSize.isValid();
}

The function is supposed to return true if the format is VALID; however it states "return d->pixelFormat == QVideoFrame::Format_Invalid", i.e. return true if the format is INVALID!
The comparision should be != rather than ==.

Reproduce:
Create a valid VideoSurfaceFormat instance. Call the isValid() method.
e.g.

QSize size(640, 480);
QVideoSurfaceFormat format(size, QVideoFrame::Format_RGB32);
format.isValid();

Expected result:
True

Actual result:
False

The bug is present in the 4.6.3 MSVC SDK which I am using, and also according to git, it is still in the latest 4.7 branch.