[CFL] Fix memset on fixed-size array
[CFL] Fix memset on fixed-size array

Change-Id: Ida78c0ab57f1293d6de2ac674fdca0c9e9361c2b

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