gstlal_etg_pipe: fixed bug with channel lists for command lines

gstlal-ugly/bin/gstlal_etg_pipe

@@ -118,7 +118,7 @@ def etg_node_gen(gstlalETGJob, dag, parent_nodes, segsdict, ifo, options, channe
 			outstr = outstr + channel + ":" + str(int(samp_rate))
 
 			# Adds channel to current process
-			if cumsum_rates < n_streams:
+			if cumsum_rates < n_streams and ii < len(data_source_info.channel_dict.keys()):
 				outstr = outstr + " --channel-name="
 
 			# Finalise each process once number of streams passes threshold