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 e22575cfb635ff549656eeb554f84334d91721c7)
1 file changed