Reserve memory for cells in probability_values.cc (#1531)
Reserve memory for cells in probability_values.cc (#1531)

Done to avoid unnecessary reallocation.
cartographer-project/cartographer,larics/cartographer,larics/cartographer,googlecartographer/cartographer,wohe/cartographer,cartographer-project/cartographer,cartographer-project/cartographer,larics/cartographer,wohe/cartographer,cartographer-project/cartographer,wohe/cartographer,wohe/cartographer,googlecartographer/cartographer,googlecartographer/cartographer,larics/cartographer,googlecartographer/cartographer