Throw exception on integer overflow in dng_ifd.cpp.

Bug: 36724453
Test: manual, see b/36724453
Change-Id: I6115361002d3e4167ff7ff654e1fd2176ac24e87
(cherry picked from commit 2cb858a7ed887b231086ae81e2b35a3614299da3)
(cherry picked from commit 1cc3bdb6e11a9a6ce4629d77960a895cfb055200)
1 file changed