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 5e702072c8012638e4356eb2e62f5f8f910bd01d)
1 file changed