Fix int overflow in decode_coefs()
Fix int overflow in decode_coefs()

BUG=b/69205191

Change-Id: I79e404dc2cd6db06e71a64338b74eb4b575ba431
(cherry picked from commit 85f2a5ae4c15de5dd530766eb3933b9de976d9cf)

GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom