Setup frame/tile boundary when frame/tile geometry changes

Change-Id: I44bc9d8887526a5ee92bf79730fa3ce6c73b160b
diff --git a/av1/decoder/decoder.c b/av1/decoder/decoder.c
index 3998c20..aaea636 100644
--- a/av1/decoder/decoder.c
+++ b/av1/decoder/decoder.c
@@ -492,6 +492,8 @@
   } else {
     cm->last_width = cm->width;
     cm->last_height = cm->height;
+    cm->last_tile_cols = cm->tile_cols;
+    cm->last_tile_rows = cm->tile_rows;
     if (cm->show_frame) {
       cm->current_video_frame++;
     }