Fix reference to undefined device object in appinfo

[halemmerich]

This currently causes the CI app tests for the BangleApps repo to essentially just always return fine since no tests are actually run. During test runs this errors out and does not print an error because there is no catch on the apploader.getAppFilesString(app) promise.

There currently seems to be something wrong with the test reset since running single tests (not all tests for a single app) works while running more than one fails with Uncaught SyntaxError: Got [ERASED] expected EOF. I'm pretty sure that is a different issue and only hidden by this one.

[gfwilliams]

Thanks for spotting this!

Yes, that SyntaxError: Got [ERASED] expected EOF sounds different. It usually happens when the device has booted up and then all the code in flash is erased - I guess reset() still calls .boot0 which could be leaving some code in there. reset(1) would also delete boot code, so maybe just changing that in the test runner would do it.