Initialize the reference vector list

Change-Id: If5e82229ca9e312c167230d0f0c8c8c8a785892d
diff --git a/av1/decoder/decodemv.c b/av1/decoder/decodemv.c
index 90eb6d8..181dd5a 100644
--- a/av1/decoder/decodemv.c
+++ b/av1/decoder/decodemv.c
@@ -1636,6 +1636,8 @@
   mbmi->palette_mode_info.palette_size[1] = 0;
 #endif  // CONFIG_PALETTE
 
+  memset(ref_mvs, 0, sizeof(ref_mvs));
+
   read_ref_frames(cm, xd, r, mbmi->segment_id, mbmi->ref_frame);
   is_compound = has_second_ref(mbmi);