Try to remove a compilation error and a few warnings in server_lobby.cpp

Author: kimden

src/network/protocols/server_lobby.cpp

@@ -1917,7 +1917,7 @@ void ServerLobby::asynchronousUpdate()
             std::string track_name = winner_vote.m_track_name;
             if (ServerConfig::m_soccer_tournament)
             {
-                if (m_tournament_game >= m_tournament_arenas.size())
+                if (m_tournament_game >= (int)m_tournament_arenas.size())
                     m_tournament_arenas.resize(m_tournament_game + 1, "");
                 m_tournament_arenas[m_tournament_game] = track_name;
             }
@@ -2138,7 +2138,8 @@ bool ServerLobby::canLiveJoinNow() const
         float total_distance =
             Track::getCurrentTrack()->getTrackLength() *
             (float)RaceManager::get()->getNumLaps();
-        float progress = leader_distance / total_distance;
+        // standard version uses (leader_distance / total_distance > 0.9f)
+        // TODO: allow switching
         if (total_distance - leader_distance < 250.0)
             return false;
     }
@@ -2400,7 +2401,6 @@ void ServerLobby::finishedLoadingLiveJoinClient(Event* event)
     live_join_start_time += 3000;
 
     bool spectator = false;
-    FreeForAll* ffa_world = dynamic_cast<FreeForAll*>(World::getWorld());
     for (const int id : peer->getAvailableKartIDs())
     {
         const RemoteKartInfo& rki = RaceManager::get()->getKartInfo(id);
@@ -2570,7 +2570,7 @@ void ServerLobby::update(int ticks)
                             peer->getPlayerProfiles()[0]->getName()).c_str();
                 Log::info("ServerLobby", "%s %s has been idle on the server for "
                         "more than %d seconds, kick.",
-                        peer->getAddress().toString().c_str(), peer_name, sec);
+                        peer->getAddress().toString().c_str(), peer_name.c_str(), sec);
                 peer->kick();
             }
         }
@@ -6830,7 +6830,7 @@ void ServerLobby::storeResults()
         }
     }
     m_saved_ffa_points.clear();
-    for (int i = 0; i < usernames.size(); ++i)
+    for (int i = 0; i < (int)usernames.size(); ++i)
     {
         std::string query = StringUtils::insertValues(
             "INSERT INTO %s "
@@ -6852,7 +6852,8 @@ void ServerLobby::storeResults()
 #endif
         );
         std::string name = usernames[i];
-        bool written = easySQLQuery(query, [name](sqlite3_stmt* stmt)
+        //bool written =
+        easySQLQuery(query, [name](sqlite3_stmt* stmt)
         {
             if (sqlite3_bind_text(stmt, 1, name.c_str(),
                 -1, SQLITE_TRANSIENT) != SQLITE_OK)