0f62cc9 providers/proxy: fixed wrong check

1 file Authored by atikhonov 5 years ago, Committed by jhrozek 5 years ago,
    providers/proxy: fixed wrong check
    
    Fixed evident "copy-paste" bug with wrong var being checked for NULL
    in proxy_id.c:remove_duplicate_group_members()
    
    Reviewed-by: Pavel Březina <pbrezina@redhat.com>