change warnmessage sensitivity and found another -1

re #13936

Framework/API/src/WorkspaceHistory.cpp

@@ -370,7 +370,7 @@ WorkspaceHistory::parseAlgorithmHistory(const std::string &rawData) {
   // Get the duration
   getWordsInString(info[EXEC_DUR], dummy, dummy, temp, dummy);
   double dur = boost::lexical_cast<double>(temp);
-  if (dur < 0.0) {
+  if (dur < -1.0) {
     g_log.warning() << "Error parsing duration in algorithm history entry."
                     << "\n";
     dur = -1.0;

Framework/DataHandling/src/SaveNexus.cpp

@@ -147,7 +147,7 @@ void SaveNexus::runSaveNexusProcessed() {
   // If we're tracking history, add the entry before we save it to file
   if (trackingHistory()) {
     m_history->fillAlgorithmHistory(
-        this, Mantid::Kernel::DateAndTime::getCurrentTime(), -1,
+        this, Mantid::Kernel::DateAndTime::getCurrentTime(), 0,
         Algorithm::g_execCount);
     if (!isChild()) {
       m_inputWorkspace->history().addHistory(m_history);