thumb: Fix a typo in a comment
thumb: Fix a typo in a comment

Change-Id: Ic318be9d74a95793abc41501fe563164de53a6d7

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