Fix the md5 mismatch for some scale cases.
Fix the md5 mismatch for some scale cases.

Fixes issue #731
Change-Id: Id313e84b8fb4ff20f6a4e1ed11cb601927888318

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