p2p: fix adding wrong indices to the filtered peer list

src/p2p/net_node.inl

@@ -1432,10 +1432,10 @@ namespace nodetool
 
       std::deque<size_t> filtered;
       const size_t limit = use_white_list ? 20 : std::numeric_limits<size_t>::max();
-      size_t idx = 0, skipped = 0;
       for (int step = 0; step < 2; ++step)
       {
         bool skip_duplicate_class_B = step == 0;
+        size_t idx = 0, skipped = 0;
         zone.m_peerlist.foreach (use_white_list, [&classB, &filtered, &idx, &skipped, skip_duplicate_class_B, limit, next_needed_pruning_stripe](const peerlist_entry &pe){
           if (filtered.size() >= limit)
             return false;