Tidied code in Pheanstalk::reserve() handling non-exceptional error responses.
Tidied code in Pheanstalk::reserve() handling non-exceptional error responses.

dcb9/pheanstalk,augustash/pheanstalk,Pasarkode/pheanstalk,jbboehr/pheanstalk,pda/pheanstalk,lcwxz1989/pheanstalk,jhammer/pheanstalk