Removing unnecessary casts to int64_t.
Removing unnecessary casts to int64_t.

Change-Id: I156419fdf68056759a4cd4206cc829a00025ef78

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