Fixing check to include undefined (#1194)
Fixing check to include undefined (#1194)


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