Fix typo (-- left off from option)

git-svn-id: http://svn.savannah.nongnu.org/svn/rdiff-backup@1009 2b77aa54-bcbc-44c9-a7ec-4f6cf2b41109

trunk/rdiff-backup/rdiff_backup/Main.py

@@ -199,7 +199,7 @@ def parse_cmdlineoptions(arglist):
 		elif opt == "--tempdir": tempfile.tempdir = arg
 		elif opt == "--terminal-verbosity": Log.setterm_verbosity(arg)
 		elif opt == "--test-server": action = "test-server"
-		elif opt == "use-compatible-timestamps":
+		elif opt == "--use-compatible-timestamps":
 			Globals.set("use_compatible_timestamps", 1)
 		elif opt == "--user-mapping-file": user_mapping_filename = arg
 		elif opt == "-v" or opt == "--verbosity": Log.setverbosity(arg)