Fix compile error of convolve_round and compound_round
Fix compile error of convolve_round and compound_round

BUG=aomedia:597
Change-Id: I6ff109fac8351a98a672259532520e062c1e6497

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