minor checksum changes

main change is checksum of zero buffer is now 0 instead of
the equivalent, but technically incorrect 0xFFFF.

Test: TreeHugger
Bug: 265591307
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I1a8b0ace704009f82d3b7ad1c299bf8a6d8964d8
2 files changed
tree: f61b7c189da9f41dbd22b0e315f54ff7890fd3d5
  1. staticlibs/