Fixed nullpointer in auto trace finish check

BauSystem_Main/src/de/steamwar/bausystem/features/tracer/Recorder.java

@@ -101,7 +101,7 @@ public class Recorder implements Listener {
      */
     public void checkForAutoTraceFinish(){
         for(Region region: autoTraceRegions)
-            if(autoTraceRegions.contains(region) && noTntRecordedCounter.get(region) > AUTO_TRACE_STOP_TRESHHOLD){
+            if(autoTraceRegions.contains(region) && noTntRecordedCounter.get(region) != null && noTntRecordedCounter.get(region) > AUTO_TRACE_STOP_TRESHHOLD){
                 stopRecording(region);
                 autoTraceRegions.remove(region);
             }
@@ -160,7 +160,7 @@ public class Recorder implements Listener {
        List<TNTRecord> history = historyMap.getOrDefault(tntPrimed, new ArrayList<>());
        UUID tntID;
 
-       if(historyMap.size() == 0){
+       if(history.size() == 0){
            historyMap.put(tntPrimed, history);
            tntID = UUID.randomUUID();
        }