lvalert_helper.py : fix indexing in get_coinc_xmldoc

gstlal-inspiral/python/lvalert_helper.py

@@ -68,7 +68,7 @@ def get_filename(gracedb_client, graceid, filename, retries = 3, retry_delay = 1
 
 
 def get_coinc_xmldoc(gracedb_client, graceid, filename = "coinc.xml"):
-	return ligolw_utils.load_fileobj(get_filename(gracedb_client, graceid, filename = filename), contenthandler = LIGOLWContentHandler)[0]
+	return ligolw_utils.load_fileobj(get_filename(gracedb_client, graceid, filename = filename), contenthandler = LIGOLWContentHandler)
 
 
 def upload_fig(fig, gracedb_client, graceid, filename, log_message, tagname = "psd"):