[1.0] fix for Python 2.5
[1.0] fix for Python 2.5

jonahbull/py-amqp,yetone/py-amqp,yetone/py-amqp,smurfix/aio-py-amqp,dims/py-amqp,dallasmarlow/py-amqp,smurfix/aio-py-amqp,dallasmarlow/py-amqp,jonahbull/py-amqp,dims/py-amqp