Fix Potential Deadlock In fq_client_publish
Fix Potential Deadlock In fq_client_publish

It was possible to acquire a lock, then never release it by returning
early without releasing the lock. Change to release the lock before
returning an error.

circonus-labs/fq,circonus-labs/fq,circonus-labs/fq,circonus-labs/fq,circonus-labs/fq,circonus-labs/fq