Jerome Jiang 597d1f4c03 vp9: Fix ubsan failure in denoiser.
Fix the overflow for subtraction between two unsigned integers.

BUG=webm:1432

Change-Id: I7b665e93ba5850548810eff23258782c4f5ee15a
2017-05-10 13:43:17 -07:00
..
2017-05-08 16:16:52 -07:00