Better filtering of g3 files in spt3g-coadd-maps utility

Author: arahlin

maps/bin/spt3g-coadd-maps

@@ -40,6 +40,6 @@ P.add_argument(
 args = P.parse_args()
 
 args.input_files = sum([glob.glob(x) for x in args.input_files], [])
-args.input_files = [x for x in args.input_files if ".g3" in x[-6:]]
+args.input_files = [x for x in args.input_files if "g3" in x.split(".")[-2:]]
 
 maps.coadd_map_files(**vars(args))