Fix a ISO C90 warning
Fix a ISO C90 warning

2147483648 by itself can not be represented by a 32 bit "int".

Change-Id: I738573fed9f53c00b04693306acb9ad43a6485a9

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