Core: Some warning fixes

--HG--
branch : trunk

src/server/game/Server/WorldSession.cpp

@@ -222,7 +222,7 @@ bool WorldSession::Update(uint32 diff, PacketFilter& updater)
 
     ///- Retrieve packets from the receive queue and call the appropriate handlers
     /// not process packets if socket already closed
-    WorldPacket* packet;
+    WorldPacket* packet = NULL;
     while (m_Socket && !m_Socket->IsClosed() && _recvQueue.next(packet, updater))
     {
         /*#if 1

src/server/game/Server/WorldSocket.cpp

@@ -626,7 +626,7 @@ int WorldSocket::handle_input_missing_data (void)
         }
     }
 
-    return n == recv_size ? 1 : 2;
+    return size_t(n) == recv_size ? 1 : 2;
 }
 
 int WorldSocket::cancel_wakeup_output (GuardType& g)