Fix: scheduler: Don't output a resource header with no list.
    
    If there's no resources to print, don't output just the header with
    nothing under it.  This potentially comes up if there are only inactive
    resources, but inactive_resources is FALSE.
    
    patch_name: 015-feature-set.patch
    present_in_specfile: true
    location_in_specfile: 15
    squash_commits: true