vp9-denoiser: Fix to reset frame_stats.
vp9-denoiser: Fix to reset frame_stats.

zeromv_lastref_sse was not reset.

Change-Id: I23c12e804d63dc7dc18514f6efe71de1d1acbd6a

ittiamvpx/libvpx-1,Topopiccione/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,luctrudeau/aom,mwgoldsmith/vpx,mbebenita/aom,smarter/aom,mwgoldsmith/vpx,ShiftMediaProject/libvpx,shacklettbp/aom,webmproject/libvpx,ShiftMediaProject/libvpx,mbebenita/aom,smarter/aom,luctrudeau/aom,jmvalin/aom,mbebenita/aom,ittiamvpx/libvpx-1,Topopiccione/libvpx,webmproject/libvpx,mwgoldsmith/libvpx,luctrudeau/aom,GrokImageCompression/aom,openpeer/libvpx_new,smarter/aom,Topopiccione/libvpx,mwgoldsmith/libvpx,smarter/aom,webmproject/libvpx,mbebenita/aom,ShiftMediaProject/libvpx,openpeer/libvpx_new,GrokImageCompression/aom,mwgoldsmith/vpx,ittiamvpx/libvpx-1,mwgoldsmith/vpx,shacklettbp/aom,luctrudeau/aom,openpeer/libvpx_new,webmproject/libvpx,shacklettbp/aom,mwgoldsmith/libvpx,shacklettbp/aom,mbebenita/aom,thdav/aom,ittiamvpx/libvpx-1,Topopiccione/libvpx,jmvalin/aom,ShiftMediaProject/libvpx,mwgoldsmith/vpx,webmproject/libvpx,openpeer/libvpx_new,jmvalin/aom,openpeer/libvpx_new,jmvalin/aom,Topopiccione/libvpx,thdav/aom,thdav/aom,thdav/aom,ittiamvpx/libvpx-1,mbebenita/aom,smarter/aom,shacklettbp/aom,smarter/aom,Topopiccione/libvpx,mbebenita/aom,mwgoldsmith/libvpx,GrokImageCompression/aom,shacklettbp/aom,luctrudeau/aom,GrokImageCompression/aom,GrokImageCompression/aom,openpeer/libvpx_new,mwgoldsmith/libvpx,thdav/aom,jmvalin/aom,ittiamvpx/libvpx-1,mwgoldsmith/libvpx,mwgoldsmith/vpx,thdav/aom,mbebenita/aom,luctrudeau/aom,GrokImageCompression/aom,mbebenita/aom,jmvalin/aom