DO NOT MERGE | libvpx: cherry pick fix to OOB of mv_cost index.

Bug: b/72510002
Test: poc provided in the bug.

Change-Id: I540894035395d20713dd73d06caccbd23b58eb00
(cherry picked from commit 8bd201f4f0ce3d5aa6746136339812d15c958b15)
1 file changed