Don't try to verify a non-existent wallet.dat

src/init.cpp

@@ -507,6 +507,8 @@ bool AppInit2()
             return false;
     }
 
+    if (filesystem::exists(GetDataDir() / "wallet.dat"))
+    {
         CDBEnv::VerifyResult r = bitdb.Verify("wallet.dat", CWalletDB::Recover);
         if (r == CDBEnv::RECOVER_OK)
         {
@@ -518,6 +520,7 @@ bool AppInit2()
         }
         if (r == CDBEnv::RECOVER_FAIL)
             return InitError(_("wallet.dat corrupt, salvage failed"));
+    }
 
     // ********************************************************* Step 6: network initialization