fixed null runtime

src/explorviz/live_trace_processing/filter/reconstruction/TraceReconstructionBuffer.java

@@ -74,7 +74,10 @@ class TraceReconstructionBuffer {
 		final Stack<AbstractBeforeEventRecord> stack = new Stack<AbstractBeforeEventRecord>();
 		for (final AbstractEventRecord event : events) {
 			if (event instanceof AbstractBeforeEventRecord) {
-				stack.push((AbstractBeforeEventRecord) event);
+				final AbstractBeforeEventRecord beforeEvent = (AbstractBeforeEventRecord) event;
+				beforeEvent.setRuntimeStatisticInformation(new RuntimeStatisticInformation(1, -1,
+						-1)); // TODO if invalid trace would be null...
+				stack.push(beforeEvent);
 			} else if ((event instanceof AbstractAfterEventRecord)
 					|| (event instanceof AbstractAfterFailedEventRecord)) {
 				if (!stack.isEmpty()) {