create litecoin genesis block, the missing code

litecoin genesis block

        assert(block.hashMerkleRoot == uint256("0x38ca78a781d3c571a681ea2241ffb1e0d89bd1ecd3499f1bf6edeaa8751e7151"));

        // If genesis block hash does not match, then generate new genesis hash.
       if (false && block.GetHash() != hashGenesisBlock)
       {
           printf("Searching for genesis block...\n");
           // This will figure out a valid hash and Nonce if you're
           // creating a different genesis block:
           uint256 hashTarget = CBigNum().SetCompact(block.nBits).getuint256();
           uint256 thash;
           char scratchpad[SCRYPT_SCRATCHPAD_SIZE];

           loop
           {
               scrypt_1024_1_1_256_sp_generic(BEGIN(block.nVersion), BEGIN(thash), scratchpad);
               if (thash <= hashTarget)
                   break;
               if ((block.nNonce & 0xFFF) == 0)
               {
                   printf("nonce %08X: hash = %s (target = %s)\n", block.nNonce, thash.ToString().c_str(), hashTarget.ToString().c_str());
               }
               ++block.nNonce;
               if (block.nNonce == 0)
               {
                   printf("NONCE WRAPPED, incrementing time\n");
                   ++block.nTime;
               }
           }
           printf("block.nTime = %u \n", block.nTime);
           printf("block.nNonce = %u \n", block.nNonce);
           printf("block.GetHash = %s\n", block.GetHash().ToString().c_str());
       }


        block.print();

Hello,
This doesn't work for litecoin 0.18.1 code base, can you update it?