gstlal_feature_synchronizer: fix typo in adding features to queue causing...

gstlal_feature_synchronizer: fix typo in adding features to queue causing problems with combining features

gstlal-burst/bin/gstlal_feature_synchronizer

@@ -118,7 +118,7 @@ class StreamSynchronizer(object):
 
             ### add to queue if timestamp is within timeout
             if feature_subset['timestamp'] >= self.max_timeout():
-                self.add_to_queue(feature_subset['timestamp'], feature_subset['etg_data'])
+                self.add_to_queue(feature_subset['timestamp'], feature_subset['features'])
 
     def fetch_all_data(self):
         """