Test should honor existing compression

unittests/block_tests.cpp

@@ -58,13 +58,14 @@ std::pair<signed_block_ptr, signed_block_ptr> corrupt_trx_in_block(validating_te
 
    // Make a copy of the valid block and corrupt the transaction
    auto copy_b = std::make_shared<signed_block>(b->clone());
-   auto signed_tx = copy_b->transactions.back().trx.get<packed_transaction>().get_signed_transaction();
+   const auto& packed_trx = copy_b->transactions.back().trx.get<packed_transaction>();
+   auto signed_tx = packed_trx.get_signed_transaction();
    // Corrupt one signature
    signed_tx.signatures.clear();
    signed_tx.sign(main.get_private_key(act_name, "active"), main.control->get_chain_id());
 
    // Replace the valid transaction with the invalid transaction
-   auto invalid_packed_tx = packed_transaction(signed_tx);
+   auto invalid_packed_tx = packed_transaction(signed_tx, packed_trx.get_compression());
    copy_b->transactions.back().trx = invalid_packed_tx;
 
    // Re-calculate the transaction merkle