Fix the building errors with CONFIG_SMVP_IMPROVEMENT off
For issue #141.
diff --git a/av1/common/mvref_common.c b/av1/common/mvref_common.c
index 36d7d75..9024d0d 100644
--- a/av1/common/mvref_common.c
+++ b/av1/common/mvref_common.c
@@ -2254,6 +2254,9 @@
mi_col, rf, row_offset, ref_mv_stack, ref_mv_weight,
refmv_count, &row_match_count, &dummy_newmv_count,
gm_mv_candidates, max_row_offset,
+#if CONFIG_SKIP_MODE_DRL_WITH_REF_IDX
+ ref_frame_idx0, ref_frame_idx1,
+#endif // CONFIG_SKIP_MODE_DRL_WITH_REF_IDX
#if CONFIG_WARP_REF_LIST
warp_param_stack, max_num_of_warp_candidates,
valid_num_warp_candidates, ref_frame,
@@ -2270,6 +2273,9 @@
rf, col_offset, ref_mv_stack, ref_mv_weight, refmv_count,
&col_match_count, &dummy_newmv_count, gm_mv_candidates,
max_col_offset,
+#if CONFIG_SKIP_MODE_DRL_WITH_REF_IDX
+ ref_frame_idx0, ref_frame_idx1,
+#endif // CONFIG_SKIP_MODE_DRL_WITH_REF_IDX
#if CONFIG_WARP_REF_LIST
warp_param_stack, max_num_of_warp_candidates,
valid_num_warp_candidates, ref_frame,