Cleaning up vp9_mcomp.c.
Cleaning up vp9_mcomp.c.

Change-Id: I24a3f0f215d04fb8888c303642dd5663cc593317

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px,GrokImageCompression/aom,webmproject/libvpx,Maria1099/webm.libvpx,reimaginemedia/webm.libvpx,luctrudeau/aom,luctrudeau/aom,Suvarna1488/webm.libvpx,thdav/aom,jacklicn/webm.libvpx,VTCSecureLLC/libvpx,Acidburn0zzz/webm.libvpx,Acidburn0zzz/webm.libvpx,altogother/webm.libvpx,n4t/libvpx,kleopatra999/webm.libvpx,shareefalis/libvpx,Suvarna1488/webm.libvpx,jacklicn/webm.libvpx,mwgoldsmith/libvpx,zofuthan/libvpx,Maria1099/webm.libvpx