Directly return if listing server return empty
Avoid unnecessary process if listing server return empty list. Change-Id: Ia82de76b306b38d9206a8bacf235bfc1db0440fc
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@ -379,6 +379,8 @@ class ListServer(command.Lister):
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data = bc_client.server.list(detailed=True,
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all_projects=parsed_args.all_projects)
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if not data:
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return (), ()
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net_client = self.app.client_manager.network
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addr_fmt = functools.partial(cli_utils.addresses_formatter, net_client)
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formatters = {'addresses': addr_fmt,
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