[repacker] include LookupList size when calculating size of 16bit space for ext promotion decisions.
diff --git a/src/graph/graph.hh b/src/graph/graph.hh
index df845da..5c5b5a4 100644
--- a/src/graph/graph.hh
+++ b/src/graph/graph.hh
@@ -111,6 +111,10 @@
       return priority >= 3;
     }
 
+    size_t table_size () const {
+      return obj.tail - obj.head;
+    }
+
     int64_t modified_distance (unsigned order) const
     {
       // TODO(garretrieger): once priority is high enough, should try