Merge pull request 'Fix' (#240) from tracer/fix-historyMap-nullpointer into master

Reviewed-on: #240
Reviewed-by: YoyoNow <jwsteam@nidido.de>

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

@@ -248,5 +248,6 @@ public class TraceRecorder implements Listener {
         tntSpawnRegion.remove((TNTPrimed) event.getEntity());
 
         activeTraces.get(region).addRecord(record((TNTPrimed) event.getEntity(), activeTraces.get(region), event.blockList()));
+        historyMap.remove((TNTPrimed) event.getEntity());
     }
 }