* Add missing return in BleFingerprint::fingerprintServiceAdvertisements
This isn't _strictly_ required because setId() ignores "downgrades" to more
generic ID types (i.e. from ID_TYPE_FLORA to ID_TYPE_AD in this case) but
skips running unnecessary code and makes the code more readable.
* Fix incorrect check in hextostr()
This function decodes hex-encoded strings (e.g. "41" -> "A"). Previously we'd
check whether the output buffer's size is a multiple of two. This would
incorrectly reject valid uses of the function. Instead we should check the
input string's length.
Gunnar Beutner
Darrell