message: fix a typo found during review.
diff: @@ -2145,7 +2145,7 @@ namespace eosio {
  void net_plugin_impl::handle_message( connection_ptr c, const packed_transaction &msg) {
  fc_dlog(logger, "got a signed transaction from ${p}", ("p",c->peer_name()));
  if( sync_master->is_active(c) ) {
  - fc_dlog(logger, "got a txn during sync - droppXning");
  + fc_dlog(logger, "got a txn during sync - dropping");
  return;
  }
  