protocol: only print sync complete message when out of precompiled hashes

This avoids most premature triggers

src/cryptonote_protocol/cryptonote_protocol_handler.inl

@@ -2064,7 +2064,7 @@ skip:
   bool t_cryptonote_protocol_handler<t_core>::on_connection_synchronized()
   {
     bool val_expected = false;
-    if(m_synchronized.compare_exchange_strong(val_expected, true))
+    if(!m_core.is_within_compiled_block_hash_area(m_core.get_current_blockchain_height()) && m_synchronized.compare_exchange_strong(val_expected, true))
     {
       MGINFO_YELLOW(ENDL << "**********************************************************************" << ENDL
         << "You are now synchronized with the network. You may now start monero-wallet-cli." << ENDL