blockchain: log block (not chain) height in "BLOCK SUCCESFULLY ADDED"

This makes it log the same height as the original code, which is
less confusing when comparing behaviors.

src/cryptonote_core/blockchain.cpp

@@ -2631,7 +2631,7 @@ bool Blockchain::handle_block_to_main_chain(const block& bl, const crypto::hash&
     // do this after updating the hard fork state since the size limit may change due to fork
     update_next_cumulative_size_limit();
 
-    LOG_PRINT_L1("+++++ BLOCK SUCCESSFULLY ADDED" << std::endl << "id:\t" << id << std::endl << "PoW:\t" << proof_of_work << std::endl << "HEIGHT " << new_height << ", difficulty:\t" << current_diffic << std::endl << "block reward: " << print_money(fee_summary + base_reward) << "(" << print_money(base_reward) << " + " << print_money(fee_summary) << "), coinbase_blob_size: " << coinbase_blob_size << ", cumulative size: " << cumulative_block_size << ", " << block_processing_time << "(" << target_calculating_time << "/" << longhash_calculating_time << ")ms");
+    LOG_PRINT_L1("+++++ BLOCK SUCCESSFULLY ADDED" << std::endl << "id:\t" << id << std::endl << "PoW:\t" << proof_of_work << std::endl << "HEIGHT " << new_height-1 << ", difficulty:\t" << current_diffic << std::endl << "block reward: " << print_money(fee_summary + base_reward) << "(" << print_money(base_reward) << " + " << print_money(fee_summary) << "), coinbase_blob_size: " << coinbase_blob_size << ", cumulative size: " << cumulative_block_size << ", " << block_processing_time << "(" << target_calculating_time << "/" << longhash_calculating_time << ")ms");
     if(m_show_time_stats)
     {
         LOG_PRINT_L0("Height: " << new_height << " blob: " << coinbase_blob_size << " cumm: "