FBO scenegraph example generates compiler warning

In file included from C:/Qt/6.2.2/mingw_64/include/QtQml/qqml.h:43,
                 from fboitem_qmltyperegistrations.cpp:7:
C:/Qt/6.2.2/mingw_64/include/QtQml/qqmlprivate.h: In function 'void QQmlPrivate::createInto(void*, void*) [with T = FboInSGRenderer]':
C:/Qt/6.2.2/mingw_64/include/QtQml/qqmlprivate.h:188:45: warning: 'static void QQmlPrivate::QQmlElement<T>::operator delete(void*, void*) [with T = FboInSGRenderer]' called on pointer returned from a mismatched allocation function [-Wmismatched-new-delete]
  188 |     void createInto(void *memory, void *) { new (memory) QQmlElement<T>; }
      |                                             ^~~~~~~~~~~~~~~~~~~~~~~~~~~
C:/Qt/6.2.2/mingw_64/include/QtQml/qqmlprivate.h:188:45: note: returned from 'void* operator new(std::size_t, void*)'

CONFIG += qmltypes
QML_IMPORT_NAME = SceneGraphRendering
QML_IMPORT_MAJOR_VERSION = 1