Dequantization code cleanup.
Dequantization code cleanup.

Removing redundant variables, using x *= y instead x = x * y, moving
variable declarations into inner blocks.

Change-Id: I884f95c755f55d51b7c1c6585f10296919063e41

shacklettbp/aom,mwgoldsmith/vpx,altogother/webm.libvpx,iniwf/webm.libvpx,luctrudeau/aom,kleopatra999/webm.libvpx,gshORTON/webm.libvpx,jacklicn/webm.libvpx,Laknot/libvpx,Maria1099/webm.libvpx,sanyaade-teachings/libvpx,luctrudeau/aom,jdm/libvpx,openpeer/libvpx_new,turbulenz/libvpx,abwiz0086/webm.libvpx,iniwf/webm.libvpx,GrokImageCompression/aom,shareefalis/libvpx,kim42083/webm.libvpx,pcwalton/libvpx,Acidburn0zzz/webm.libvpx,liqianggao/libvpx,ittiamvpx/libvpx-1,ittiamvpx/libvpx,iniwf/webm.libvpx,thdav/aom,pcwalton/libvpx,pcwalton/libvpx,luctrudeau/aom,iniwf/webm.libvpx,matanbs/vp982,zofuthan/libvpx,abwiz0086/webm.libvpx,openpeer/libvpx_new,thdav/aom,stewnorriss/libvpx,liqianggao/libvpx,matanbs/webm.libvpx,webmproject/libvpx,reimaginemedia/webm.libvpx,mbebenita/aom,stewnorriss/libvpx,lyx2014/libvpx_c,mwgoldsmith/vpx,Maria1099/webm.libvpx,GrokImageCompression/aom,shareefalis/libvpx,iniwf/webm.libvpx,jmvalin/aom,jacklicn/webm.libvpx,shyamalschandra/libvpx,kleopatra999/webm.libvpx,cinema6/libvpx,ShiftMediaProject/libvpx,sanyaade-teachings/libvpx,vasilvv/esvp8,VTCSecureLLC/libvpx,gshORTON/webm.libvpx,vasilvv/esvp8,Topopiccione/libvpx,openpeer/libvpx_new,turbulenz/libvpx,abwiz0086/webm.libvpx,ShiftMediaProject/libvpx,turbulenz/libvpx,matanbs/vp982,matanbs/vp982,smarter/aom,thdav/aom,VTCSecureLLC/libvpx,gshORTON/webm.libvpx,reimaginemedia/webm.libvpx,altogother/webm.libvpx,goodleixiao/vpx,gshORTON/webm.libvpx,matanbs/webm.libvpx,altogother/webm.libvpx,shacklettbp/aom,zofuthan/libvpx,kleopatra999/webm.libvpx,charup/https---github.com-webmproject-libvpx-,Maria1099/webm.libvpx,Suvarna1488/webm.libvpx,smarter/aom,charup/https---github.com-webmproject-libvpx-,liqianggao/libvpx,VTCSecureLLC/libvpx,webmproject/libvpx,Distrotech/libvpx,matanbs/vp982,matanbs/vp982,abwiz0086/webm.libvpx,liqianggao/libvpx,cinema6/libvpx,goodleixiao/vpx,Acidburn0zzz/webm.libvpx,VTCSecureLLC/libvpx,kalli123/webm.libvpx,zofuthan/libvpx,reimaginemedia/webm.libvpx,ittiamvpx/libvpx-1,felipebetancur/libvpx,abwiz0086/webm.libvpx,liqianggao/libvpx,mwgoldsmith/libvpx,zofuthan/libvpx,luctrudeau/aom,felipebetancur/libvpx,GrokImageCompression/aom,vasilvv/esvp8,altogother/webm.libvpx,goodleixiao/vpx,jdm/libvpx,Topopiccione/libvpx,shyamalschandra/libvpx,jacklicn/webm.libvpx,thdav/aom,mbebenita/aom,shyamalschandra/libvpx,turbulenz/libvpx,kleopatra999/webm.libvpx,openpeer/libvpx_new,luctrudeau/aom,running770/libvpx,lyx2014/libvpx_c,sanyaade-teachings/libvpx,n4t/libvpx,lyx2014/libvpx_c,shareefalis/libvpx,kleopatra999/webm.libvpx,sanyaade-teachings/libvpx,kim42083/webm.libvpx,ittiamvpx/libvpx-1,mwgoldsmith/vpx,mwgoldsmith/libvpx,mwgoldsmith/libvpx,matanbs/webm.libvpx,zofuthan/libvpx,thdav/aom,charup/https---github.com-webmproject-libvpx-,pcwalton/libvpx,matanbs/webm.libvpx,GrokImageCompression/aom,running770/libvpx,kalli123/webm.libvpx,turbulenz/libvpx,matanbs/webm.libvpx,ShiftMediaProject/libvpx,smarter/aom,running770/libvpx,shyamalschandra/libvpx,jmvalin/aom,ittiamvpx/libvpx-1,ittiamvpx/libvpx,openpeer/libvpx_new,felipebetancur/libvpx,vasilvv/esvp8,shacklettbp/aom,reimaginemedia/webm.libvpx,smarter/aom,Suvarna1488/webm.libvpx,mbebenita/aom,running770/libvpx,luctrudeau/aom,vasilvv/esvp8,GrokImageCompression/aom,hsueceumd/test_hui,hsueceumd/test_hui,kleopatra999/webm.libvpx,iniwf/webm.libvpx,matanbs/webm.libvpx,hsueceumd/test_hui,Distrotech/libvpx,jdm/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,pcwalton/libvpx,Topopiccione/libvpx,jdm/libvpx,webmproject/libvpx,running770/libvpx,felipebetancur/libvpx,turbulenz/libvpx,hsueceumd/test_hui,jmvalin/aom,ittiamvpx/libvpx,mbebenita/aom,VTCSecureLLC/libvpx,mwgoldsmith/vpx,Acidburn0zzz/webm.libvpx,shyamalschandra/libvpx,Laknot/libvpx,mbebenita/aom,Suvarna1488/webm.libvpx,VTCSecureLLC/libvpx,kim42083/webm.libvpx,mwgoldsmith/vpx,Acidburn0zzz/webm.libvpx,mbebenita/aom,jmvalin/aom,matanbs/vp982,turbulenz/libvpx,ShiftMediaProject/libvpx,kalli123/webm.libvpx,kim42083/webm.libvpx,hsueceumd/test_hui,hsueceumd/test_hui,shacklettbp/aom,Suvarna1488/webm.libvpx,pcwalton/libvpx,WebRTC-Labs/libvpx,smarter/aom,Laknot/libvpx,jacklicn/webm.libvpx,charup/https---github.com-webmproject-libvpx-,WebRTC-Labs/libvpx,vasilvv/esvp8,Distrotech/libvpx,shareefalis/libvpx,shacklettbp/aom,cinema6/libvpx,jacklicn/webm.libvpx,ittiamvpx/libvpx,mwgoldsmith/libvpx,goodleixiao/vpx,Laknot/libvpx,stewnorriss/libvpx,kim42083/webm.libvpx,WebRTC-Labs/libvpx,stewnorriss/libvpx,Suvarna1488/webm.libvpx,Topopiccione/libvpx,smarter/aom,mwgoldsmith/vpx,charup/https---github.com-webmproject-libvpx-,ittiamvpx/libvpx,reimaginemedia/webm.libvpx,Maria1099/webm.libvpx,jmvalin/aom,Distrotech/libvpx,n4t/libvpx,mbebenita/aom,liqianggao/libvpx,ittiamvpx/libvpx-1,shareefalis/libvpx,WebRTC-Labs/libvpx,Distrotech/libvpx,lyx2014/libvpx_c,thdav/aom,n4t/libvpx,mwgoldsmith/libvpx,kalli123/webm.libvpx,Suvarna1488/webm.libvpx,jdm/libvpx,kim42083/webm.libvpx,turbulenz/libvpx,sanyaade-teachings/libvpx,ittiamvpx/libvpx,WebRTC-Labs/libvpx,goodleixiao/vpx,kalli123/webm.libvpx,n4t/libvpx,webmproject/libvpx,shacklettbp/aom,cinema6/libvpx,mbebenita/aom,stewnorriss/libvpx,vasilvv/esvp8,shyamalschandra/libvpx,turbulenz/libvpx,felipebetancur/libvpx,Distrotech/libvpx,openpeer/libvpx_new,Topopiccione/libvpx,ittiamvpx/libvpx-1,abwiz0086/webm.libvpx,felipebetancur/libvpx,lyx2014/libvpx_c,jacklicn/webm.libvpx,Topopiccione/libvpx,Maria1099/webm.libvpx,altogother/webm.libvpx,Acidburn0zzz/webm.libvpx,shareefalis/libvpx,altogother/webm.libvpx,stewnorriss/libvpx,GrokImageCompression/aom,cinema6/libvpx,jmvalin/aom,webmproject/libvpx,goodleixiao/vpx,reimaginemedia/webm.libvpx,gshORTON/webm.libvpx,matanbs/vp982,Laknot/libvpx,cinema6/libvpx,cinema6/libvpx,n4t/libvpx,mbebenita/aom,Maria1099/webm.libvpx,kalli123/webm.libvpx,gshORTON/webm.libvpx,running770/libvpx,jdm/libvpx,mwgoldsmith/libvpx,Laknot/libvpx,charup/https---github.com-webmproject-libvpx-,zofuthan/libvpx,lyx2014/libvpx_c,Acidburn0zzz/webm.libvpx