Error is raised when all_accounts is set to True

[pokoli]

Here is the traceback:

UnboundLocalError: local variable 'line' referenced before assignment
  File "trytond/protocols/dispatcher.py", line 186, in _dispatch
    result = rpc.result(meth(*c_args, **c_kwargs))
  File "trytonspain_account_jasper_reports-5.4.0-py3.7.egg/trytond/modules/account_jasper_reports/general_ledger.py", line 367, in execute
    records, parameters = cls.prepare(data)
  File "trytonspain_account_jasper_reports-5.4.0-py3.7.egg/trytond/modules/account_jasper_reports/general_ledger.py", line 306, in prepare
    if line.account.type and line.account.type.receivable: