Initialization bug for multi arf.

Moved erroneous reset of cpi->multi_arf_last_grp_enabled.

Change-Id: Ibb0b96f6ed1d5eeb575a3b1c798e0fe2ee651d06

vp9/encoder/vp9_encoder.c

diff --git a/vp9/encoder/vp9_encoder.c b/vp9/encoder/vp9_encoder.c
index c5e8726..90ba344 100644
--- a/vp9/encoder/vp9_encoder.c
+++ b/vp9/encoder/vp9_encoder.c
@@ -1435,6 +1435,7 @@
 #endif
 
   cpi->refresh_alt_ref_frame = 0;
+  cpi->multi_arf_last_grp_enabled = 0;
 
   cpi->b_calculate_psnr = CONFIG_INTERNAL_STATS;
 #if CONFIG_INTERNAL_STATS
@@ -3420,7 +3421,6 @@
     cpi->multi_arf_allowed = 1;
   else
     cpi->multi_arf_allowed = 0;
-  cpi->multi_arf_last_grp_enabled = 0;
 
   // Normal defaults
   cm->reset_frame_context = 0;