Fix failing test

libraries/chain/chain_controller.cpp

@@ -326,6 +326,7 @@ signed_block chain_controller::_generate_block(
       if( new_total_size >= maximum_block_size )
       {
          postponed_tx_count++;
+         ++itr;
          continue;
       }
 

tests/tests/native_contract_tests.cpp

@@ -508,6 +508,7 @@ BOOST_FIXTURE_TEST_CASE(auth_links, testing_fixture) { try {
    }
 
    Transfer_Asset(chain, inita, alice, Asset(1000));
+   chain.produce_blocks();
    // Take off the training wheels, we're gonna fully validate transactions now
    chain.set_auto_sign_transactions(false);
    chain.set_skip_transaction_signature_checking(false);