when processing gossip packets make sure to also update the node bitmap when...

when processing gossip packets make sure to also update the node bitmap when associating slots to nodes. Fixed simply using the appropriate helper function to add a slot.

src/cluster.c

@@ -636,7 +636,7 @@ int clusterProcessPacket(clusterLink *link) {
                         if (server.cluster.slots[j] == NULL ||
                             server.cluster.slots[j]->flags & REDIS_NODE_FAIL)
                         {
-                            server.cluster.slots[j] = sender;
+                            clusterAddSlot(sender,j);
                             update_state = update_config = 1;
                         }
                     }