Fix container-overflow in Carver::carve
Fix container-overflow in Carver::carve

Issue highlighted by asan activated in PR osquery/osquery#5628

Do not use clear() on a vector inizialized with a fixed size to clear
it of its contents when using it as a char buffer.

PR: osquery/osquery#5665

hackgnar/osquery,hackgnar/osquery,hackgnar/osquery