Silient a compiler warning in av1_decode_block_tokens
Silient a compiler warning in av1_decode_block_tokens

Change-Id: I581bdb5edacd92fd40b28327fcd5bfb062dc9b5b

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