General vp9_encodeframe.c cleanup.
General vp9_encodeframe.c cleanup.

Change-Id: Ie364fe837002de96923da2c1c0ff8bb4b8d469a7

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