fuzz: fix `implicit-integer-sign-change` in wallet_create_transaction

src/wallet/test/fuzz/spend.cpp

@@ -46,7 +46,7 @@ FUZZ_TARGET(wallet_create_transaction, .init = initialize_setup)
     if (fuzzed_data_provider.ConsumeBool()) coin_control.m_version = fuzzed_data_provider.ConsumeIntegral<unsigned int>();
     coin_control.m_avoid_partial_spends = fuzzed_data_provider.ConsumeBool();
     coin_control.m_include_unsafe_inputs = fuzzed_data_provider.ConsumeBool();
-    if (fuzzed_data_provider.ConsumeBool()) coin_control.m_confirm_target = fuzzed_data_provider.ConsumeIntegral<unsigned int>();
+    if (fuzzed_data_provider.ConsumeBool()) coin_control.m_confirm_target = fuzzed_data_provider.ConsumeIntegralInRange<unsigned int>(0, 999'000);
     coin_control.destChange = fuzzed_data_provider.ConsumeBool() ? fuzzed_wallet.GetDestination(fuzzed_data_provider) : ConsumeTxDestination(fuzzed_data_provider);
     if (fuzzed_data_provider.ConsumeBool()) coin_control.m_change_type = fuzzed_data_provider.PickValueInArray(OUTPUT_TYPES);
     if (fuzzed_data_provider.ConsumeBool()) coin_control.m_feerate = CFeeRate(ConsumeMoney(fuzzed_data_provider, /*max=*/COIN));