loop_filter_rows_mt: remove dependency on 'last_height'
loop_filter_rows_mt: remove dependency on 'last_height'

using this to control reallocation would miss a change if the function
were not called for every frame.
fixes potential memory corruption by the subsequent memset

Change-Id: I4c6bb6ab68803104fc824c7e27cc2f9b2cf53e33

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