wallet: Remove use_max_sig default value

As we change the constructor for COutput, it becomes somewhat dangerous
if there are default values.

src/bench/coin_selection.cpp

@@ -58,7 +58,7 @@ static void CoinSelection(benchmark::Bench& bench)
     // Create coins
     std::vector<COutput> coins;
     for (const auto& wtx : wtxs) {
-        coins.emplace_back(wallet, *wtx, 0 /* iIn */, 6 * 24 /* depth */, true /* spendable */, true /* solvable */, true /* safe */);
+        coins.emplace_back(wallet, *wtx, /*iIn=*/ 0, /*depth=*/ 6 * 24, /*spendable=*/ true, /*solvable=*/ true, /*safe=*/ true, /*use_max_sig_in=*/ false);
     }
 
     const CoinEligibilityFilter filter_standard(1, 6, 0);

src/wallet/spend.cpp

@@ -275,7 +275,7 @@ std::map<CTxDestination, std::vector<COutput>> ListCoins(const CWallet& wallet)
                 CTxDestination address;
                 if (ExtractDestination(FindNonChangeParentOutput(wallet, *it->second.tx, output.n).scriptPubKey, address)) {
                     result[address].emplace_back(
-                        wallet, it->second, output.n, depth, true /* spendable */, true /* solvable */, false /* safe */);
+                        wallet, it->second, output.n, depth, /*spendable=*/ true, /*solvable=*/ true, /*safe=*/ false, /*use_max_sig_in=*/ false);
                 }
             }
         }

src/wallet/spend.h

@@ -48,7 +48,7 @@ public:
      */
     bool safe;
 
-    COutput(const CWallet& wallet, const CWalletTx& wtx, int iIn, int depth, bool spendable, bool solvable, bool safe, bool use_max_sig_in = false)
+    COutput(const CWallet& wallet, const CWalletTx& wtx, int iIn, int depth, bool spendable, bool solvable, bool safe, bool use_max_sig_in)
         : tx(&wtx),
         i(iIn),
         depth(depth),

src/wallet/test/coinselector_tests.cpp

@@ -98,7 +98,7 @@ static void add_coin(std::vector<COutput>& coins, CWallet& wallet, const CAmount
         wtx.m_amounts[CWalletTx::DEBIT].Set(ISMINE_SPENDABLE, 1);
         wtx.m_is_cache_empty = false;
     }
-    COutput output(wallet, wtx, nInput, nAge, true /* spendable */, true /* solvable */, true /* safe */);
+    COutput output(wallet, wtx, nInput, nAge, /*spendable=*/ true, /*solvable=*/ true, /*safe=*/ true, /*use_max_sig_in=*/ false);
     coins.push_back(output);
 }