280f69c TESTS: Use NULL for pointer, not 0

1 file Authored by jhrozek 6 years ago, Committed by lslebodn 6 years ago,
    TESTS: Use NULL for pointer, not 0
    
    Reviewed-by: Pavel Březina <pbrezina@redhat.com>
    Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>