MifareUltralight::isUnformatted() returns false

[JereckNET]

In "MifareUltralight.cpp", the function "isUnformatted" returns false when the tag is not formatted.

The function "read()" never displays the warning message and returns an NfcTag with an empty NdefMessage. (and subsequent calls to "tag.hasNdefMessage()" return true).

When I changed the code so the function "isUnformatted" returns "false", the warning message is displayed and subsequent calls to "tag.hasNdefMessage()" return false.