Prevent OOB read in rw_t3t_update_block()

Test: NFC enable/disable
Bug: 120506143
Bug: 120497437
Bug: 120497583
Change-Id: I839333505a253788e43a48a61eb7a646328c7fec
(cherry picked from commit 3652c138153fe5ceba3520495b384c6ae14a9286)
1 file changed