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
diff --git a/av1/encoder/rdopt.c b/av1/encoder/rdopt.c
index 627352b..53b8717 100644
--- a/av1/encoder/rdopt.c
+++ b/av1/encoder/rdopt.c
@@ -8989,10 +8989,6 @@
           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 @@
 #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) {