Added casting to QT_OFF_T type. Otherwise fails on some compilers. Change-Id: I4f1f0c558af7d182a4babf38a7f048b27b3db611 Reviewed-by: Pasi Petäjäjärvi <pasi.petajajarvi@theqtcompany.com> Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>