Fix a few build errors

src/test/app/LoanBroker_test.cpp

@@ -121,12 +121,12 @@ class LoanBroker_test : public beast::unit_test::suite
         std::array const assets{xrpAsset, iouAsset, mptAsset};
 
         // Create vaults
-        struct Vault
+        struct VaultInfo
         {
             PrettyAsset const& asset;
             uint256 vaultID;
         };
-        std::vector<Vault> vaults;
+        std::vector<VaultInfo> vaults;
         for (auto const& asset : assets)
         {
             auto [tx, keylet] = vault.create({.owner = alice, .asset = asset});

src/test/ledger/Invariants_test.cpp

@@ -1423,7 +1423,6 @@ class Invariants_test : public beast::unit_test::suite
                 PrettyAsset const xrpAsset{xrpIssue(), 1'000'000};
 
                 // Create vault
-                uint256 vaultID;
                 Vault vault{env};
                 auto [tx, vKeylet] =
                     vault.create({.owner = a, .asset = xrpAsset});