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vp9: Change condition to enable recheck_zeromv_after_denoising.

For when denoising enabled: change condition to enable
the recheck_zeromv_after_denoising for only very high noise level.
This is causing an issue, so enabling it for very high noise
to effectively shut it off.

Change-Id: Ic40d6025f3f398338cedd270d17c0ccd9a3daa84

--- a/vp9/encoder/vp9_pickmode.c

+++ b/vp9/encoder/vp9_pickmode.c

@@ -1235,7 +1235,7 @@

   // denoised result. Only do this under noise conditions, and if rdcost of

   // ZEROMV onoriginal source is not significantly higher than rdcost of best

   // mode.

-  if (cpi->noise_estimate.enabled && cpi->noise_estimate.level > kLow &&

+  if (cpi->noise_estimate.enabled && cpi->noise_estimate.level > kHigh &&

       ctx_den->zero_last_cost_orig < (best_rdc->rdcost << 3) &&

       ((ctx_den->best_ref_frame == INTRA_FRAME && decision >= FILTER_BLOCK) ||

        (ctx_den->best_ref_frame == GOLDEN_FRAME &&