Squash type conversion warnings in MSVC
Squash type conversion warnings in MSVC

Change-Id: I457edba98dd1ebbd212651247d6c0d1a34f780d6

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