enable relancing to work with distributed grids

src/fix_ave_grid.cpp

@@ -691,6 +691,17 @@ void FixAveGrid::end_of_step()
   }
 }
 
+/* ----------------------------------------------------------------------
+   subset of grid assigned to each proc may have changed
+   called by load balancer when proc subdomains are adjusted
+   not supported for now, b/c requires per-grid values to persist, i.e. a remap()
+------------------------------------------------------------------------- */
+
+void FixAveGrid::reset_grid()
+{
+  error->all(FLERR,"Fix ave/grid does not support load balancing (yet)");
+}
+
 /* ----------------------------------------------------------------------
    sum per-atom contributions to owned+ghost grid cells
    sets one of vec2d,array2d,vec3d,array3d