vp9_thread_test: quiet some msvc int->bool warnings
vp9_thread_test: quiet some msvc int->bool warnings

Change-Id: I2ed1cb537831c8b595c74ec641296d13d38ef622

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