Fix misprint in hw_oldkernel.js
Fix misprint in hw_oldkernel.js

Looks like return statement was omitted from setPinMode,

Before change I've seen errors like this:
Can not switch pin P9_12 into OUTPUT mode: TypeError: Cannot read property 'err' of undefined
    at Object.f.pinMode (/home/ubuntu/node-nest/node_modules/bonescript/index.js:161:19)
    at ...
    at /home/ubuntu/node-nest/node_modules/unofficial-nest-api/index.js:231:17
    at IncomingMessage.<anonymous> (/home/ubuntu/node-nest/node_modules/unofficial-nest-api/index.js:213:25)
    at IncomingMessage.EventEmitter.emit (events.js:117:20)
beagleboard/bonescript,risebox/bonescript,risebox/bonescript,jadonk/bonescript,jadonk/bonescript,beagleboard/bonescript