message: Fix div by 0 error in resource_limits
diff: @@ -426,7 +426,7 @@ int64_t resource_limits_manager::get_account_net_limit( const account_name& name
  int64_t net_weight;
  get_account_limits( name, unused, net_weight, unused );
  - if( net_weight < 0 ) {
  + if( net_weight < 0 || state.total_net_weight == 0 ) {
  return -1;
  }
  @@ -465,6 +465,7 @@ account_resource_limit resource_limits_manager::get_account_net_limit_ex( const
  uint128_t user_weight = net_weight;
  uint128_t all_user_weight = state.total_net_weight;
  +
  auto max_user_use_in_window = (virtual_network_capacity_in_window * user_weight) / all_user_weight;
  auto net_used_in_window = (usage.net_usage.value_ex * window_size) / config::rate_limiting_precision;
  