Fix a compile error on MSVC 64bits due to qhash casting a pointer.
Fix a compile error on MSVC 64bits due to qhash casting a pointer.

I tested it with 32 bits compilation and there is no warning any more.

Task-number: 247325
Reviewed-by: ogoffart

RLovelett/qt,igor-sfdc/qt-wk,pruiz/wkhtmltopdf-qt,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,igor-sfdc/qt-wk,RLovelett/qt,KDE/qt,igor-sfdc/qt-wk,RLovelett/qt,RLovelett/qt,RLovelett/qt,RLovelett/qt,igor-sfdc/qt-wk,radekp/qt,pruiz/wkhtmltopdf-qt,radekp/qt,radekp/qt,KDE/qt,KDE/qt,RLovelett/qt,radekp/qt,KDE/qt,radekp/qt,radekp/qt,KDE/qt,RLovelett/qt,pruiz/wkhtmltopdf-qt,pruiz/wkhtmltopdf-qt,KDE/qt,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,KDE/qt,radekp/qt,pruiz/wkhtmltopdf-qt,RLovelett/qt,igor-sfdc/qt-wk,KDE/qt,radekp/qt,RLovelett/qt,igor-sfdc/qt-wk,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,radekp/qt,pruiz/wkhtmltopdf-qt,radekp/qt,pruiz/wkhtmltopdf-qt,RLovelett/qt,igor-sfdc/qt-wk