Lib: add bounds check on amqp_login inputs
Lib: add bounds check on amqp_login inputs

Check bounds on channel_max, frame_max, and heartbeat arguments to
amqp_login* functions.

alanxz/rabbitmq-c,Haster2004/rabbitmq-c,alanxz/rabbitmq-c,alanxz/rabbitmq-c,Haster2004/rabbitmq-c,Haster2004/rabbitmq-c