wallet2: ensure transfers and sweeps use same fee calc logic

Ensures both transfers and sweeps use a fee that's calculated
from the tx's weight. Using different logic could theoretically
enable distinguishability between the two types of txs. We don't
want that.

src/wallet/wallet2.cpp

@@ -10974,7 +10974,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
       else
       {
         LOG_PRINT_L2("We made a tx, adjusting fee and saving it, we need " << print_money(needed_fee) << " and we have " << print_money(test_ptx.fee));
-        while (needed_fee > test_ptx.fee) {
+        do {
           if (use_rct)
             transfer_selected_rct(tx.dsts, tx.selected_transfers, fake_outs_count, outs, valid_public_keys_cache, unlock_time, needed_fee, extra,
               test_tx, test_ptx, rct_config, use_view_tags);
@@ -10985,7 +10985,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
           needed_fee = calculate_fee(use_per_byte_fee, test_ptx.tx, txBlob.size(), base_fee, fee_quantization_mask);
           LOG_PRINT_L2("Made an attempt at a  final " << get_weight_string(test_ptx.tx, txBlob.size()) << " tx, with " << print_money(test_ptx.fee) <<
             " fee  and " << print_money(test_ptx.change_dts.amount) << " change");
-        }
+        } while (needed_fee > test_ptx.fee);
 
         LOG_PRINT_L2("Made a final " << get_weight_string(test_ptx.tx, txBlob.size()) << " tx, with " << print_money(test_ptx.fee) <<
           " fee  and " << print_money(test_ptx.change_dts.amount) << " change");
@@ -11381,7 +11381,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_from(const crypton
       THROW_WALLET_EXCEPTION_IF(needed_fee > available_for_fee, error::wallet_internal_error, "Transaction cannot pay for itself");
 
       do {
-        LOG_PRINT_L2("We made a tx, adjusting fee and saving it");
+        LOG_PRINT_L2("We made a tx, adjusting fee and saving it, we need " << print_money(needed_fee) << " and we have " << print_money(test_ptx.fee));
         // distribute total transferred amount between outputs
         uint64_t amount_transferred = available_for_fee - needed_fee;
         uint64_t dt_amount = amount_transferred / outputs;