honor NEWTON_ON/OFF request flags

src/neigh_request.cpp

@@ -268,6 +268,8 @@ void NeighRequest::apply_flags(int flags)
   if (flags & REQ_GHOST)       { ghost = 1; }
   if (flags & REQ_SIZE)        { size = 1; }
   if (flags & REQ_HISTORY)     { history = 1; }
+  if (flags & REQ_NEWTON_ON)   { newton = 1; }
+  if (flags & REQ_NEWTON_OFF)  { newton = 2; }
   if (flags & REQ_OCCASIONAL)  { occasional = 1; }
   if (flags & REQ_RESPA_INOUT) { respainner = respaouter = 1; }
   if (flags & REQ_RESPA_ALL)   { respainner = respamiddle = respaouter = 1; }
@@ -276,17 +278,17 @@ void NeighRequest::apply_flags(int flags)
 
 /* ---------------------------------------------------------------------- */
 
-void NeighRequest::set_id(int _id)
-{
-  id = _id;
-}
-
 void NeighRequest::set_cutoff(double _cutoff)
 {
   cut = 1;
   cutoff = _cutoff;
 }
 
+void NeighRequest::set_id(int _id)
+{
+  id = _id;
+}
+
 void NeighRequest::set_kokkos_device(int flag)
 {
   kokkos_device = flag;

src/neigh_request.h

@@ -122,10 +122,10 @@ class NeighRequest : protected Pointers {
   void copy_request(NeighRequest *, int);
 
   void apply_flags(int);
+  void set_cutoff(double);
   void set_id(int);
   void set_kokkos_device(int);
   void set_kokkos_host(int);
-  void set_cutoff(double);
   void set_skip(int *, int **);
 
   int get_size() const { return size; }