attachInterrupt: enable handler to simply be true
attachInterrupt: enable handler to simply be true

* If handler is true, pass data to callback

beagleboard/bonescript,risebox/bonescript,weboide/antl,mwillbanks/octalbonescript,theoctal/octalbonescript,il9ue/bonesimulator,il9ue/bonesimulator,jadonk/bonescript,jadonk/bonescript,risebox/bonescript,weboide/antl,beagleboard/bonescript