[hooks/notification] Fix indentation
Follow-up for changeset 1b8552265f3b "[hooks/notification] use a cnx not a
session"
import ConfigParser
try:
undo_actions = config.cfgfile_parser.get('MAIN', 'undo-support', False)
except ConfigParser.NoOptionError:
pass # this conf. file was probably already migrated
else:
config.global_set_option('undo-enabled', bool(undo_actions))