SIPS sometimes send empty notifications. I have been unable to find out
why or to reproduce the issue; it seems to be linked to a delay on their
end since these notifications usually arrive after a customer is
redirected back to Odoo (at least on their test account).
I'd rather log a warning for those cases (since nothing is wrong on
Odoo's side, there's just no info to act upon) instead of a full
traceback.
closesodoo/odoo#49335
X-original-commit: 100ef1bdb7b90edbeccfa6cd10297acb824b8083
Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>