Fix bug in sb8x8 bitstream decoding.
Fix bug in sb8x8 bitstream decoding.

Change-Id: I7ac69a369851b09d9422f2e3c62b12b3fcd49a4c

matanbs/vp982,zofuthan/libvpx,shareefalis/libvpx,GrokImageCompression/aom,zofuthan/libvpx,luctrudeau/aom,pcwalton/libvpx,jacklicn/webm.libvpx,cinema6/libvpx,kalli123/webm.libvpx,jmvalin/aom,liqianggao/libvpx,thdav/aom,kalli123/webm.libvpx,ittiamvpx/libvpx,Suvarna1488/webm.libvpx,mbebenita/aom,turbulenz/libvpx,Laknot/libvpx,Laknot/libvpx,felipebetancur/libvpx,Acidburn0zzz/webm.libvpx,mbebenita/aom,pcwalton/libvpx,iniwf/webm.libvpx,shareefalis/libvpx,iniwf/webm.libvpx,shacklettbp/aom,mwgoldsmith/vpx,Suvarna1488/webm.libvpx,openpeer/libvpx_new,Maria1099/webm.libvpx,charup/https---github.com-webmproject-libvpx-,Maria1099/webm.libvpx,lyx2014/libvpx_c,stewnorriss/libvpx,liqianggao/libvpx,Distrotech/libvpx,hsueceumd/test_hui,altogother/webm.libvpx,charup/https---github.com-webmproject-libvpx-,Distrotech/libvpx,sanyaade-teachings/libvpx,Laknot/libvpx,Acidburn0zzz/webm.libvpx,thdav/aom,abwiz0086/webm.libvpx,openpeer/libvpx_new,ittiamvpx/libvpx,matanbs/webm.libvpx,shyamalschandra/libvpx,Laknot/libvpx,smarter/aom,jdm/libvpx,Acidburn0zzz/webm.libvpx,lyx2014/libvpx_c,jacklicn/webm.libvpx,hsueceumd/test_hui,liqianggao/libvpx,webmproject/libvpx,smarter/aom,openpeer/libvpx_new,stewnorriss/libvpx,n4t/libvpx,charup/https---github.com-webmproject-libvpx-,Maria1099/webm.libvpx,shacklettbp/aom,zofuthan/libvpx,running770/libvpx,jmvalin/aom,kalli123/webm.libvpx,cinema6/libvpx,kleopatra999/webm.libvpx,ShiftMediaProject/libvpx,Acidburn0zzz/webm.libvpx,kim42083/webm.libvpx,shacklettbp/aom,shyamalschandra/libvpx,abwiz0086/webm.libvpx,reimaginemedia/webm.libvpx,ShiftMediaProject/libvpx,kleopatra999/webm.libvpx,kalli123/webm.libvpx,Distrotech/libvpx,VTCSecureLLC/libvpx,goodleixiao/vpx,kim42083/webm.libvpx,liqianggao/libvpx,jdm/libvpx,luctrudeau/aom,shareefalis/libvpx,mbebenita/aom,ittiamvpx/libvpx-1,GrokImageCompression/aom,kleopatra999/webm.libvpx,n4t/libvpx,kalli123/webm.libvpx,altogother/webm.libvpx,matanbs/vp982,cinema6/libvpx,jdm/libvpx,kleopatra999/webm.libvpx,cinema6/libvpx,sanyaade-teachings/libvpx,reimaginemedia/webm.libvpx,jacklicn/webm.libvpx,VTCSecureLLC/libvpx,smarter/aom,WebRTC-Labs/libvpx,ittiamvpx/libvpx-1,mwgoldsmith/vpx,running770/libvpx,Topopiccione/libvpx,mbebenita/aom,gshORTON/webm.libvpx,jmvalin/aom,mwgoldsmith/vpx,n4t/libvpx,Acidburn0zzz/webm.libvpx,felipebetancur/libvpx,gshORTON/webm.libvpx,running770/libvpx,abwiz0086/webm.libvpx,mbebenita/aom,hsueceumd/test_hui,matanbs/webm.libvpx,matanbs/vp982,pcwalton/libvpx,openpeer/libvpx_new,hsueceumd/test_hui,mwgoldsmith/libvpx,jacklicn/webm.libvpx,webmproject/libvpx,Topopiccione/libvpx,turbulenz/libvpx,cinema6/libvpx,turbulenz/libvpx,cinema6/libvpx,goodleixiao/vpx,Laknot/libvpx,charup/https---github.com-webmproject-libvpx-,ittiamvpx/libvpx-1,Suvarna1488/webm.libvpx,ShiftMediaProject/libvpx,running770/libvpx,pcwalton/libvpx,GrokImageCompression/aom,Maria1099/webm.libvpx,smarter/aom,altogother/webm.libvpx,zofuthan/libvpx,mwgoldsmith/libvpx,jdm/libvpx,felipebetancur/libvpx,iniwf/webm.libvpx,Topopiccione/libvpx,shacklettbp/aom,matanbs/webm.libvpx,stewnorriss/libvpx,mbebenita/aom,luctrudeau/aom,turbulenz/libvpx,charup/https---github.com-webmproject-libvpx-,kim42083/webm.libvpx,thdav/aom,gshORTON/webm.libvpx,sanyaade-teachings/libvpx,lyx2014/libvpx_c,gshORTON/webm.libvpx,webmproject/libvpx,luctrudeau/aom,VTCSecureLLC/libvpx,jmvalin/aom,iniwf/webm.libvpx,running770/libvpx,mwgoldsmith/vpx,kim42083/webm.libvpx,goodleixiao/vpx,matanbs/vp982,ittiamvpx/libvpx-1,luctrudeau/aom,Suvarna1488/webm.libvpx,VTCSecureLLC/libvpx,charup/https---github.com-webmproject-libvpx-,altogother/webm.libvpx,sanyaade-teachings/libvpx,shyamalschandra/libvpx,webmproject/libvpx,turbulenz/libvpx,shyamalschandra/libvpx,jacklicn/webm.libvpx,Laknot/libvpx,VTCSecureLLC/libvpx,abwiz0086/webm.libvpx,altogother/webm.libvpx,turbulenz/libvpx,hsueceumd/test_hui,pcwalton/libvpx,jmvalin/aom,matanbs/vp982,Topopiccione/libvpx,jdm/libvpx,GrokImageCompression/aom,ittiamvpx/libvpx-1,abwiz0086/webm.libvpx,sanyaade-teachings/libvpx,goodleixiao/vpx,felipebetancur/libvpx,GrokImageCompression/aom,Maria1099/webm.libvpx,jdm/libvpx,iniwf/webm.libvpx,matanbs/vp982,mwgoldsmith/vpx,liqianggao/libvpx,mwgoldsmith/libvpx,ittiamvpx/libvpx-1,jacklicn/webm.libvpx,stewnorriss/libvpx,WebRTC-Labs/libvpx,ittiamvpx/libvpx,mbebenita/aom,stewnorriss/libvpx,webmproject/libvpx,kleopatra999/webm.libvpx,Suvarna1488/webm.libvpx,mwgoldsmith/libvpx,zofuthan/libvpx,Suvarna1488/webm.libvpx,mbebenita/aom,Acidburn0zzz/webm.libvpx,webmproject/libvpx,kim42083/webm.libvpx,kalli123/webm.libvpx,kim42083/webm.libvpx,matanbs/webm.libvpx,matanbs/webm.libvpx,mwgoldsmith/libvpx,felipebetancur/libvpx,thdav/aom,reimaginemedia/webm.libvpx,matanbs/vp982,mwgoldsmith/vpx,goodleixiao/vpx,lyx2014/libvpx_c,openpeer/libvpx_new,reimaginemedia/webm.libvpx,openpeer/libvpx_new,shyamalschandra/libvpx,reimaginemedia/webm.libvpx,thdav/aom,ittiamvpx/libvpx,mwgoldsmith/libvpx,Topopiccione/libvpx,iniwf/webm.libvpx,running770/libvpx,turbulenz/libvpx,turbulenz/libvpx,goodleixiao/vpx,GrokImageCompression/aom,Maria1099/webm.libvpx,kleopatra999/webm.libvpx,shareefalis/libvpx,mbebenita/aom,shacklettbp/aom,pcwalton/libvpx,gshORTON/webm.libvpx,Distrotech/libvpx,Distrotech/libvpx,turbulenz/libvpx,altogother/webm.libvpx,shyamalschandra/libvpx,cinema6/libvpx,ittiamvpx/libvpx,liqianggao/libvpx,Distrotech/libvpx,matanbs/webm.libvpx,thdav/aom,hsueceumd/test_hui,n4t/libvpx,smarter/aom,WebRTC-Labs/libvpx,shareefalis/libvpx,lyx2014/libvpx_c,gshORTON/webm.libvpx,WebRTC-Labs/libvpx,jmvalin/aom,ShiftMediaProject/libvpx,VTCSecureLLC/libvpx,shareefalis/libvpx,zofuthan/libvpx,WebRTC-Labs/libvpx,stewnorriss/libvpx,n4t/libvpx,shacklettbp/aom,Topopiccione/libvpx,luctrudeau/aom,abwiz0086/webm.libvpx,lyx2014/libvpx_c,felipebetancur/libvpx,ShiftMediaProject/libvpx,ittiamvpx/libvpx,smarter/aom,reimaginemedia/webm.libvpx