Fix a missing initialization of mvs in pc_tree

Change-Id: Ie80f7d8836dcb4e6f025a232499c203f5a4eade2
diff --git a/av1/encoder/encodeframe.c b/av1/encoder/encodeframe.c
index f48befe..d9d0c56 100644
--- a/av1/encoder/encodeframe.c
+++ b/av1/encoder/encodeframe.c
@@ -4072,7 +4072,8 @@
 
     if ((sf->simple_motion_search_split ||
          sf->simple_motion_search_prune_rect ||
-         sf->simple_motion_search_early_term_none) &&
+         sf->simple_motion_search_early_term_none ||
+         sf->ml_early_term_after_part_split_level) &&
         !frame_is_intra_only(cm) && !use_nonrd_mode) {
       init_simple_motion_search_mvs(pc_root);
     }