Minor cleanup of inter mode search.
Minor cleanup of inter mode search.

Change-Id: I523a3b30eb80fc6c6ed83638fdb82cf65c22b2e5

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