quantize.c: int->uint32_t for absolute values
quantize.c: int->uint32_t for absolute values

Change-Id: I784f32e0e86d873655e46cf68c5c124a698af361

luctrudeau/aom,GrokImageCompression/aom,mbebenita/aom,smarter/aom,mbebenita/aom,luctrudeau/aom,mbebenita/aom,GrokImageCompression/aom,luctrudeau/aom,luctrudeau/aom,luctrudeau/aom,mbebenita/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,luctrudeau/aom,mbebenita/aom,smarter/aom,smarter/aom,mbebenita/aom,mbebenita/aom,mbebenita/aom,smarter/aom,smarter/aom,GrokImageCompression/aom,smarter/aom,mbebenita/aom