Fixing NaN appearing in block fields that use a slider (#2217)
Fixing NaN appearing in block fields that use a slider (#2217)

* Fix compilation of slider blocks

* Fix NaN check

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