Prevent OOB read in rw_t4t.cc

Bug: 120865977
Bug: 120274615
Bug: 124462242
Test: Read T4T Tag
Merged-In: Id1b07fa79edabaf27e18a7147d1e7ae66cf3c4b3
Change-Id: Id1b07fa79edabaf27e18a7147d1e7ae66cf3c4b3
(cherry picked from commit a8d5d162ed306e7291e7dd216a27607fe5af3241)
2 files changed