don't try to run mscc when ksRunnerReady missing
don't try to run mscc when ksRunnerReady missing

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