OSX QMessageBox uses Windows icons when setDesktopSettingsAware is false [regression]

On OSX, I expect the following code to display a message box with the current application's icon (like it used to in 4.4.3).
However the following code displays a windows icon when compiled on OSX with Qt 4.6.2.

#include <QApplication>
#include <QMessageBox>

int main(int argc, char **argv)
{
QApplication::setDesktopSettingsAware(false);
QApplication app(argc, argv);

QMessageBox::warning( 0, "test", "test" );

return 0;
}

This is a bug in QCommonStyle. I fixed it with the following change to qcommonstyle.cpp line 5660:
-if (QApplication::desktopSettingsAware() ) {
+if (QApplication::desktopSettingsAware() || inherits("QMacStyle") ) {