Fix a compile error in _psutil_linux.c if PSUTIL_HAVE_IOPRIO is false (#1695)
Fix a compile error in _psutil_linux.c if PSUTIL_HAVE_IOPRIO is false (#1695)

The macro PSUTIL_HAVE_IOPRIO is always defined.
giampaolo/psutil,0-wiz-0/psutil,0-wiz-0/psutil,giampaolo/psutil