duplicate call amqp_channel_close, it is not necessary

[fxconfig]

an AMQP can manager several Exchanges Or QUEUEs.
every of them have their own channel, right?

if I call delete AMQP* directly,
in the Destructor
channels.size() is not zero, but AMQPBase* in the vector is un-reachable.
the delete *i would throw;

So I suggest call AMQP::closeChannel() in its Destructor.

AMQPBase::~AMQPBase() {
this->closeChannel();
}

AMQP::~AMQP() {
if (channels.size()) {
vector<AMQPBase*>::iterator i;
for (i=channels.begin(); i!=channels.end();) {
delete *i;
}
}

amqp_channel_close(cnn, 1, AMQP_REPLY_SUCCESS);
amqp_connection_close(cnn, AMQP_REPLY_SUCCESS);
amqp_destroy_connection(cnn);

};