Qt6 makes sizes qsizetype; and one of these was already sizeof()-sized.
While qsizetype might not be ssize_t, it's at least no bigger, so we
can safely use its format specifier, with a suitable cast.
Change-Id: I433f654f6b139d74b4d5358b804b44ab1f0ada15
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>