aide database is corrupt when `gzip_dbout` is set to `yes`

Issue

• When gzip_dbout is set to yes, the database created by the aide --init command is corrupt. gunzip reports errors:

gzip: /var/lib/aide/aide.db.new.gz: invalid compressed data--crc error
gzip: /var/lib/aide/aide.db.new.gz: invalid compressed data--length error

• The aide --check command also produces errors:

Not enough parameters in db:123261. Trying to continue.
Not enough parameters in db:123262. Trying to continue.
db_char2line():Error while reading database

• The aide --init execution produces an error message:

Error on exit of prelink child process.