The SD stored in the allowed S-NSSAI list was hardcoded in the decoding
function, however this IE is not mandatory but optional, therefore
the check of the decoded message contents should take into account
this and check the stored value against the one from the UICC only when the field is present.
If no SD was received, consider the UICC SD a valid one.
Also, add free function to Registration Accept library and adopt in stack to free NAS
Registration Accept after use: heap memory is allocated for this message during decoding
and shall be free after processing.
Guido Casati
73b89726ad