Initialize int variables to 0 instead of 0.0
Initialize int variables to 0 instead of 0.0

fixes a couple of type conversion warnings for msvc2015

Change-Id: I004f072661c981e204bd62b2740201658ad67294

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