dlm_controld: wrong fencing time comparison (2)
    
    Slight change to commit 4039bf4817a96b6aab20de948389f43b89ce4a8e
    to account for the fact that sometimes fenced time can be within
    a second of fail time.
    
    bz 594511
    
    Signed-off-by: David Teigland <teigland@redhat.com>