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vp9-rtc: Fix condition in regulate_q for cyclic_refresh

The bits_per_mb factor from cyclic refresh does not
need to be conditioned on seg_enabled, cr->apply_cyclic_refresh
is sufficient. This is more correct for the case where
the refresh is turned off/on dynamically.

Small/neutral change in bdrate metrics.

Change-Id: Ifbeda9d3e022e6b61cdefa1482d3075f076d7253

--- a/vp9/encoder/vp9_ratectrl.c

+++ b/vp9/encoder/vp9_ratectrl.c

@@ -826,8 +826,7 @@

   i = active_best_quality;

   do {

-    if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ && cm->seg.enabled &&

-        cr->apply_cyclic_refresh &&

+    if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ && cr->apply_cyclic_refresh &&

         (!cpi->oxcf.gf_cbr_boost_pct || !cpi->refresh_golden_frame)) {

       bits_per_mb_at_this_q =

           (int)vp9_cyclic_refresh_rc_bits_per_mb(cpi, i, correction_factor);