v15, raises an error, when the imported file is empty

[BT-ssteiner]

account_ebics_oe_statement_import:

raises an uncaught error, when the imported file is empty

https://github.com/Noviat/account_ebics/blob/15.0/account_ebics_oe_statement_import/wizards/account_bank_statement_import.py#L58
There the method _create_bank_statements returns two values, but in the original/odoo core, three values are returned. Maybe just returning another [] would be enough.

[luc-demeyer]

@BT-ssteiner
I'll make a fix for this.
Can you send me offline ([email protected]) the empty file so that I can reproduce the issue locally and text my fix.