Lib: correct sign conversion issue in amqp_url.c
Lib: correct sign conversion issue in amqp_url.c

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