Use the actual inter prediction filter buffer in DRL

This avoids an encoding segmentation fault in speed 5, due to the
use of uninitialized dummy inter prediction filter buffer in the
dynamic motion vector referencing scheme.

Change-Id: Icd888d46623e8abf34267838135eed8656d552e4

av1/encoder/rdopt.c

@@ -8989,10 +8989,6 @@ void av1_rd_pick_inter_mode_sb(const AV1_COMP *cpi, TileDataEnc *tile_data,
           clamp_mv2(&cur_mv.as_mv, xd);
 
           if (!mv_check_bounds(x, &cur_mv.as_mv)) {
-            InterpFilter dummy_single_inter_filter[MB_MODE_COUNT]
-                                                  [TOTAL_REFS_PER_FRAME] = {
-                                                    { 0 }
-                                                  };
             int dummy_single_skippable[MB_MODE_COUNT]
                                       [TOTAL_REFS_PER_FRAME] = { { 0 } };
 #if CONFIG_EXT_INTER
@@ -9020,8 +9016,7 @@ void av1_rd_pick_inter_mode_sb(const AV1_COMP *cpi, TileDataEnc *tile_data,
 #else
                 dummy_single_newmv,
 #endif
-                dummy_single_inter_filter, dummy_single_skippable, &tmp_sse,
-                best_rd);
+                single_inter_filter, dummy_single_skippable, &tmp_sse, best_rd);
           }
 
           for (i = 0; i < mbmi->ref_mv_idx; ++i) {