Make sure base class ctor is marked as used (avoids assertion fail) (#5012)
Make sure base class ctor is marked as used (avoids assertion fail) (#5012)


switchinnovations/pxt,Microsoft/pxt,switch-education/pxt,switch-education/pxt,Microsoft/pxt,switchinnovations/pxt,switch-education/pxt,switchinnovations/pxt,switch-education/pxt,Microsoft/pxt,switch-education/pxt,Microsoft/pxt,switchinnovations/pxt,Microsoft/pxt