fuzz: coinselection, BnB should never produce change

Author: brunoerg

src/wallet/test/fuzz/coinselection.cpp

@@ -115,6 +115,7 @@ FUZZ_TARGET(coinselection)
     // Run coinselection algorithms
     auto result_bnb = SelectCoinsBnB(group_pos, target, coin_params.m_cost_of_change, MAX_STANDARD_TX_WEIGHT);
     if (result_bnb) {
+        assert(result_bnb->GetChange(coin_params.m_cost_of_change, CAmount{0}) == 0);
         assert(result_bnb->GetSelectedValue() >= target);
         (void)result_bnb->GetShuffledInputVector();
         (void)result_bnb->GetInputSet();