How to cancel a tny_transport_account_send?

[Sergio Villar Senin <svillar igalia com>]

Hi,

I'm trying to cancel the tny_transport_account_send that is performed in
the TnyCamelSendQueue with tny_account_cancel, but it does nothing. The
reason is because the "cancel" field of the private structure that
belongs to TnyCamelAccount is empty. What is means is that maybe we need
to enclose that call between the tny_camel_account_start/stop_operation.

Philip?

Br