The 32-bit counter eventually wraps to 0 which is a sentinel for invalid
id.
Make it 64-bit on LP64 platforms and 0-check otherwise.
Note: Linux counterpart uses id stored per queue instead of a global.
I did not check going that way is feasible with the goal being the
minimal fix doing the job.
Reported by: YAMAMOTO Shigeru <shigeru@os-hackers.jp>
Reviewed by: mav
Differential Revision: https://reviews.freebsd.org/D26759
c3f8f86efd