Some examples have missing values when exporting to patterndb

[faxm0dem]

Here's a pattern that has one example with missing values:

  98c131b414229ec1437da915f07c791da47bd80b:
    ruleset: systemd
    ruleclass: sequence
    patterns:
    - '@ESTRING:action: @User Manager for UID @NUMBER:integer@.'
    examples:
    - program: systemd
      test_message: Stopped User Manager for UID 0.
      test_values: {}
    - program: systemd
      test_message: Stopped User Manager for UID 9991.
      test_values:
        action: Stopped
        integer: "9991"
    - program: systemd
      test_message: Stopped User Manager for UID 300.
      test_values:
        action: Stopped
        integer: "300"

Maybe due to an ill test that returns false for a value of 0 ?