Always build occasional lists on first step

src/compute_cluster_atom.cpp

@@ -113,7 +113,7 @@ void ComputeClusterAtom::compute_peratom()
 
   // invoke full neighbor list (will copy or build if necessary)
 
-  neighbor->build_one(list,1);
+  neighbor->build_one(list);
 
   inum = list->inum;
   ilist = list->ilist;