Fixed compiler warnings.

src/network/network_string.hpp

@@ -73,6 +73,12 @@ public:
         m_string = std::vector<uint8_t>(value.begin(), value.end());
     }   // NetworkString
 
+    // ------------------------------------------------------------------------
+    NetworkString& add(const std::string &s)
+    {
+        return addUInt8(uint8_t(s.size())).as(s);
+    }   // add
+
     // ------------------------------------------------------------------------
     NetworkString& removeFront(int size)
     {

src/network/protocols/client_lobby_room_protocol.cpp

@@ -56,7 +56,7 @@ void ClientLobbyRoomProtocol::requestKartSelection(std::string kart_name)
 {
     NetworkString request;
     // 0x02 : kart selection request, size_token (4), token, size kart name, kart name
-    request.ai8(0x02).ai8(4).ai32(m_server->getClientServerToken()).ai8(kart_name.size()).as(kart_name);
+    request.ai8(0x02).ai8(4).ai32(m_server->getClientServerToken()).add(kart_name);
     m_listener->sendMessage(this, request, true);
 }   // requestKartSelection
 
@@ -96,7 +96,7 @@ void ClientLobbyRoomProtocol::voteTrack(std::string track, uint8_t track_nb)
 {
     NetworkString request;
     // 0xc0 : major vote, size_token (4), token, size track, track, size #track, #track
-    request.ai8(0xc3).ai8(4).ai32(m_server->getClientServerToken()).ai8(track.size()).as(track).ai8(1).ai8(track_nb);
+    request.ai8(0xc3).ai8(4).ai32(m_server->getClientServerToken()).add(track).ai8(1).ai8(track_nb);
     m_listener->sendMessage(this, request, true);
 }   // voteTrack
 

src/network/protocols/server_lobby_room_protocol.cpp

@@ -458,7 +458,7 @@ void ServerLobbyRoomProtocol::kartSelectionRequested(Event* event)
     // kart update (3), 1, race id
     answer.ai8(0x03).ai8(1).ai8(peer->getPlayerProfile()->race_id);
     //  kart name size, kart name
-    answer.ai8(kart_name.size()).as(kart_name);
+    answer.add(kart_name);
     m_listener->sendMessage(this, answer);
     m_setup->setPlayerKart(peer->getPlayerProfile()->race_id, kart_name);
 }