[master] fix output for CC_ESTABLISH socket file

discussed via jabber

src/lib/cc/session.cc

@@ -119,7 +119,7 @@ private:
 void
 SessionImpl::establish(const char& socket_file) {
     try {
-        LOG_DEBUG(logger, DBG_TRACE_BASIC, CC_ESTABLISH).arg(socket_file);
+        LOG_DEBUG(logger, DBG_TRACE_BASIC, CC_ESTABLISH).arg(&socket_file);
         socket_.connect(asio::local::stream_protocol::endpoint(&socket_file),
                         error_);
         LOG_DEBUG(logger, DBG_TRACE_BASIC, CC_ESTABLISHED);