Fix instance reference to self:
Maintain consistency of instance reference.
Fix logical if condition for no inputs:
Kutil(privkey=....) was being overwritten due to this logical statement allowing
for the creation of a new blank instance of PrivateKey()
Fix instance reference to self: Maintain consistency of instance reference.
Fix logical if condition for no inputs: Kutil(privkey=....) was being overwritten due to this logical statement allowing for the creation of a new blank instance of PrivateKey()