message: fix typo in multi_index
diff: @@ -619,7 +619,7 @@ class multi_index
  template<typename Lambda>
  const_iterator emplace( uint64_t payer, Lambda&& constructor ) {
  - eosio_assert( _code == current_receiver(), "cannot modify objects in table of another contract" ); // Quick fix for mutating db using multi_index that shouldn't allow mutation. Real fix can come in RC2.
  + eosio_assert( _code == current_receiver(), "cannot create objects in table of another contract" ); // Quick fix for mutating db using multi_index that shouldn't allow mutation. Real fix can come in RC2.
  auto itm = std::make_unique<item>( this, [&]( auto& i ){
  T& obj = static_cast<T&>(i);
  