add a break to prevent possible endless loop

update.cpp

@@ -123,6 +123,7 @@ Update::Update(Worker *worker,
         // must deliver 'true', only then are all data from hwapi valid
         if (--tries < 0) {
             qCritical() << "ERROR!!! DC DATA NOT VALID -> CA-MASTER-PLUGIN NOT CONNECTED";
+            break;
         }
         m_hw->dc_autoRequest(true);
         QThread::msleep(500);