BUG/MEDIUM: mworker: fix several typos in mworker_cleantasks()

Commit 27f3fa5 ("BUG/MEDIUM: mworker: stop every tasks in the master")
used MAX_THREADS as a mask instead of MAX_THREADS_MASK to clean the
global run queue, and used rq_next (global variable) instead of next_rq.

Renamed next_rq as tmp_rq and next_wq as tmp_wq to avoid confusion.

No backport needed.
1 file changed