gstlal-ugly/bin/gstlal_ll_dq: fix assertion error when theres no range history data

gstlal-ugly/bin/gstlal_ll_dq

@@ -116,11 +116,12 @@ class NoiseTracker(object):
 
 			### store and reduce noise / range history
 			for route in self.routes:
-				if self.injections:
-					measurement = f"inj_{route}"
-				else:
-					measurement = route
-				agg_sink.store_columns(measurement, data[route], aggregate="max")
+				if self.datadeq[route]:
+					if self.injections:
+						measurement = f"inj_{route}"
+					else:
+						measurement = route
+					agg_sink.store_columns(measurement, data[route], aggregate="max")
 
 			### output "latest" psd to kafka
 			if self.client and self.psd: