Fix remaining PR comments

include/customizer/cell_customizer.hpp

@@ -37,7 +37,7 @@ class CellCustomizer
                    const std::vector<bool> &allowed_nodes,
                    CellMetric &metric,
                    LevelID level,
-                   CellID id)
+                   CellID id) const
     {
         auto cell = cells.GetCell(metric, level, id);
         auto destinations = cell.GetDestinationNodes();
@@ -98,7 +98,7 @@ class CellCustomizer
     void Customize(const GraphT &graph,
                    const partition::CellStorage &cells,
                    const std::vector<bool> &allowed_nodes,
-                   CellMetric &metric)
+                   CellMetric &metric) const
     {
         Heap heap_exemplar(graph.GetNumberOfNodes());
         HeapPtr heaps(heap_exemplar);

include/partition/cell_storage.hpp

@@ -338,8 +338,8 @@ template <storage::Ownership Ownership> class CellStorageImpl
         }
 
         const auto &last_cell = cells.back();
-        ValueOffset total_size = cells.back().value_offset +
-                                 last_cell.num_source_nodes * last_cell.num_destination_nodes;
+        ValueOffset total_size =
+            last_cell.value_offset + last_cell.num_source_nodes * last_cell.num_destination_nodes;
 
         metric.weights.resize(total_size + 1, INVALID_EDGE_WEIGHT);
         metric.durations.resize(total_size + 1, MAXIMAL_EDGE_DURATION);