_set_transit may try to copy() an empty list

We received the traceback below from one of our customers.

Don't have a scenario to reproduce but it seems clear to me that changing the code in _set_transit should fix the issue and seems correct to me.

                 if m.state != 'done'
                 and m.from_location != shipment.transit_location
                 and m.to_location != shipment.transit_location]
+            if not moves:
+                continue
             Move.copy(moves, default={
                     'to_location': shipment.transit_location.id,
                     'planned_date': shipment.planned_start_date,

Traceback (most recent call last):
  File "/tryton/tryton/trytond/trytond/protocols/dispatcher.py", line 195, in _dispatch
    result = rpc.result(meth(*c_args, **c_kwargs))
                        ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/tryton/tryton/trytond/trytond/model/modelview.py", line 697, in wrapper
    return func(cls, records, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/tryton/tryton/trytond/trytond/model/workflow.py", line 37, in wrapper
    result = func(cls, filtered, *args, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/tryton/tryton/trytond/trytond/modules/stock/shipment.py", line 2550, in wait
    cls._set_transit(shipments)
  File "/tryton/tryton/trytond/trytond/modules/stock/shipment.py", line 2492, in _set_transit
    Move.copy(moves, default={
  File "/tryton/tryton/trytond/trytond/modules/account_stock_eu_es/stock.py", line 167, in copy
    return super().copy(moves, default=default)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/tryton/tryton/trytond/trytond/modules/account_stock_eu/stock.py", line 547, in copy
    return super().copy(moves, default=default)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/tryton/tryton/trytond/trytond/modules/account_stock_eu/stock.py", line 233, in copy
    return super().copy(moves, default=default)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/tryton/tryton/trytond/trytond/modules/account_invoice_stock/stock.py", line 75, in copy
    return super().copy(moves, default=default)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/tryton/tryton/trytond/trytond/model/workflow.py", line 58, in copy
    return super().copy(records, default=default)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/tryton/tryton/trytond/trytond/model/modelstorage.py", line 481, in copy
    cls.write(*to_write)
  File "/tryton/tryton/trytond/trytond/modules/account_stock_eu/stock.py", line 215, in write
    super().write(*args)
  File "/tryton/tryton/trytond/trytond/modules/production/stock.py", line 99, in write
    super().write(*args)
  File "/tryton/tryton/trytond/trytond/modules/account_invoice_stock/stock.py", line 86, in write
    super().write(*args)
  File "/tryton/tryton/trytond/trytond/modules/stock_shipment_measurements/stock.py", line 146, in write
    super(Move, cls).write(*args)
  File "/tryton/tryton/trytond/trytond/modules/stock/move.py", line 838, in write
    super(Move, cls).write(*args)
  File "/tryton/tryton/trytond/trytond/model/modelsql.py", line 161, in wrapper
    return func(cls, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: ModelSQL.write() missing 2 required positional arguments: 'records' and 'values'