face: Small issue with TcpChannelFactory (error from gcc-4.2.1)

Change-Id: I5ddef68db85928383b962ac56ed454d69dbdf3bc
diff --git a/daemon/face/tcp-channel-factory.hpp b/daemon/face/tcp-channel-factory.hpp
index 5027d41..1a26738 100644
--- a/daemon/face/tcp-channel-factory.hpp
+++ b/daemon/face/tcp-channel-factory.hpp
@@ -18,9 +18,9 @@
   /**
    * \brief Exception of TcpChannelFactory
    */
-  struct Error : public ChannelFactory::Error
+  struct Error : public ChannelFactory<tcp::Endpoint, TcpChannel>::Error
   {
-    Error(const std::string& what) : ChannelFactory::Error(what) {}
+    Error(const std::string& what) : ChannelFactory<tcp::Endpoint, TcpChannel>::Error(what) {}
   };
 
   TcpChannelFactory(boost::asio::io_service& ioService);