include/utime.h: avoid comparing float with 0
include/utime.h: avoid comparing float with 0

Avoid doing an exact comparison of a float with 0.

Signed-off-by: Colin McCabe <7b35906f1d014e74a9dc8c913eb229119df647aa@dreamhost.com>

ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph