Cleaning up cost_coeffs().
Cleaning up cost_coeffs().

Change-Id: I02f097fd7c4c787035f03114ddde5b04b2640b39

mwgoldsmith/libvpx,jmvalin/aom,ittiamvpx/libvpx-1,matanbs/vp982,Suvarna1488/webm.libvpx,goodleixiao/vpx,abwiz0086/webm.libvpx,ittiamvpx/libvpx,jacklicn/webm.libvpx,Laknot/libvpx,matanbs/webm.libvpx,lyx2014/libvpx_c,iniwf/webm.libvpx,pcwalton/libvpx,jacklicn/webm.libvpx,VTCSecureLLC/libvpx,smarter/aom,jmvalin/aom,shareefalis/libvpx,mwgoldsmith/vpx,kleopatra999/webm.libvpx,n4t/libvpx,mwgoldsmith/libvpx,webmproject/libvpx,openpeer/libvpx_new,abwiz0086/webm.libvpx,zofuthan/libvpx,mbebenita/aom,kalli123/webm.libvpx,altogother/webm.libvpx,GrokImageCompression/aom,running770/libvpx,matanbs/webm.libvpx,liqianggao/libvpx,running770/libvpx,mwgoldsmith/vpx,liqianggao/libvpx,pcwalton/libvpx,jdm/libvpx,jmvalin/aom,mwgoldsmith/vpx,jmvalin/aom,iniwf/webm.libvpx,goodleixiao/vpx,iniwf/webm.libvpx,Acidburn0zzz/webm.libvpx,lyx2014/libvpx_c,running770/libvpx,Distrotech/libvpx,WebRTC-Labs/libvpx,pcwalton/libvpx,GrokImageCompression/aom,felipebetancur/libvpx,matanbs/webm.libvpx,Distrotech/libvpx,altogother/webm.libvpx,jacklicn/webm.libvpx,felipebetancur/libvpx,GrokImageCompression/aom,charup/https---github.com-webmproject-libvpx-,shareefalis/libvpx,luctrudeau/aom,Maria1099/webm.libvpx,Suvarna1488/webm.libvpx,running770/libvpx,stewnorriss/libvpx,kalli123/webm.libvpx,thdav/aom,Topopiccione/libvpx,Laknot/libvpx,stewnorriss/libvpx,Acidburn0zzz/webm.libvpx,Distrotech/libvpx,kim42083/webm.libvpx,Topopiccione/libvpx,shareefalis/libvpx,matanbs/webm.libvpx,VTCSecureLLC/libvpx,Laknot/libvpx,smarter/aom,ittiamvpx/libvpx-1,ShiftMediaProject/libvpx,Acidburn0zzz/webm.libvpx,hsueceumd/test_hui,matanbs/vp982,smarter/aom,iniwf/webm.libvpx,mbebenita/aom,liqianggao/libvpx,altogother/webm.libvpx,webmproject/libvpx,shacklettbp/aom,Topopiccione/libvpx,charup/https---github.com-webmproject-libvpx-,ShiftMediaProject/libvpx,n4t/libvpx,ittiamvpx/libvpx,matanbs/webm.libvpx,webmproject/libvpx,kleopatra999/webm.libvpx,thdav/aom,charup/https---github.com-webmproject-libvpx-,felipebetancur/libvpx,abwiz0086/webm.libvpx,gshORTON/webm.libvpx,luctrudeau/aom,luctrudeau/aom,charup/https---github.com-webmproject-libvpx-,Acidburn0zzz/webm.libvpx,Laknot/libvpx,jdm/libvpx,mbebenita/aom,Suvarna1488/webm.libvpx,kim42083/webm.libvpx,mbebenita/aom,ShiftMediaProject/libvpx,gshORTON/webm.libvpx,jacklicn/webm.libvpx,shareefalis/libvpx,ittiamvpx/libvpx,openpeer/libvpx_new,mbebenita/aom,liqianggao/libvpx,shyamalschandra/libvpx,ShiftMediaProject/libvpx,iniwf/webm.libvpx,Suvarna1488/webm.libvpx,n4t/libvpx,lyx2014/libvpx_c,kleopatra999/webm.libvpx,zofuthan/libvpx,WebRTC-Labs/libvpx,abwiz0086/webm.libvpx,mwgoldsmith/libvpx,Distrotech/libvpx,pcwalton/libvpx,matanbs/vp982,thdav/aom,liqianggao/libvpx,Acidburn0zzz/webm.libvpx,running770/libvpx,kim42083/webm.libvpx,luctrudeau/aom,lyx2014/libvpx_c,shyamalschandra/libvpx,WebRTC-Labs/libvpx,GrokImageCompression/aom,webmproject/libvpx,WebRTC-Labs/libvpx,jmvalin/aom,reimaginemedia/webm.libvpx,charup/https---github.com-webmproject-libvpx-,lyx2014/libvpx_c,zofuthan/libvpx,shacklettbp/aom,reimaginemedia/webm.libvpx,shacklettbp/aom,Suvarna1488/webm.libvpx,matanbs/vp982,lyx2014/libvpx_c,Laknot/libvpx,kalli123/webm.libvpx,zofuthan/libvpx,mbebenita/aom,reimaginemedia/webm.libvpx,matanbs/vp982,mwgoldsmith/vpx,ittiamvpx/libvpx-1,kim42083/webm.libvpx,zofuthan/libvpx,stewnorriss/libvpx,goodleixiao/vpx,shyamalschandra/libvpx,ittiamvpx/libvpx-1,gshORTON/webm.libvpx,shacklettbp/aom,Topopiccione/libvpx,openpeer/libvpx_new,openpeer/libvpx_new,stewnorriss/libvpx,openpeer/libvpx_new,WebRTC-Labs/libvpx,ittiamvpx/libvpx,Acidburn0zzz/webm.libvpx,jdm/libvpx,VTCSecureLLC/libvpx,matanbs/webm.libvpx,hsueceumd/test_hui,felipebetancur/libvpx,webmproject/libvpx,Maria1099/webm.libvpx,hsueceumd/test_hui,mwgoldsmith/vpx,ittiamvpx/libvpx-1,mbebenita/aom,GrokImageCompression/aom,VTCSecureLLC/libvpx,luctrudeau/aom,kalli123/webm.libvpx,smarter/aom,reimaginemedia/webm.libvpx,jmvalin/aom,thdav/aom,Suvarna1488/webm.libvpx,shacklettbp/aom,ShiftMediaProject/libvpx,n4t/libvpx,hsueceumd/test_hui,charup/https---github.com-webmproject-libvpx-,webmproject/libvpx,kleopatra999/webm.libvpx,goodleixiao/vpx,zofuthan/libvpx,matanbs/vp982,gshORTON/webm.libvpx,reimaginemedia/webm.libvpx,gshORTON/webm.libvpx,shareefalis/libvpx,ittiamvpx/libvpx-1,mwgoldsmith/libvpx,mwgoldsmith/vpx,felipebetancur/libvpx,kim42083/webm.libvpx,Distrotech/libvpx,n4t/libvpx,kalli123/webm.libvpx,Maria1099/webm.libvpx,liqianggao/libvpx,pcwalton/libvpx,thdav/aom,mwgoldsmith/libvpx,Topopiccione/libvpx,altogother/webm.libvpx,kleopatra999/webm.libvpx,abwiz0086/webm.libvpx,altogother/webm.libvpx,jacklicn/webm.libvpx,mwgoldsmith/libvpx,mbebenita/aom,VTCSecureLLC/libvpx,shacklettbp/aom,kalli123/webm.libvpx,matanbs/vp982,luctrudeau/aom,stewnorriss/libvpx,smarter/aom,jdm/libvpx,mbebenita/aom,gshORTON/webm.libvpx,ittiamvpx/libvpx,VTCSecureLLC/libvpx,goodleixiao/vpx,pcwalton/libvpx,GrokImageCompression/aom,thdav/aom,jdm/libvpx,hsueceumd/test_hui,kleopatra999/webm.libvpx,Topopiccione/libvpx,goodleixiao/vpx,Maria1099/webm.libvpx,hsueceumd/test_hui,openpeer/libvpx_new,Distrotech/libvpx,smarter/aom,ittiamvpx/libvpx,shyamalschandra/libvpx,kim42083/webm.libvpx,Laknot/libvpx,altogother/webm.libvpx,reimaginemedia/webm.libvpx,shyamalschandra/libvpx,abwiz0086/webm.libvpx,jdm/libvpx,Maria1099/webm.libvpx,Maria1099/webm.libvpx,shyamalschandra/libvpx,iniwf/webm.libvpx,felipebetancur/libvpx,shareefalis/libvpx,jacklicn/webm.libvpx,stewnorriss/libvpx,running770/libvpx