Comment 1 for bug 1927519

Thanks Ioanna for the bug.

In our discussion that we already had I've suggested how to fix it in code and I think this still is a valid approach to harden against whatever was causing it in the first place.

After initial creation the file is meant to stay as-is to allow users
to do customization e.g. special apparmor rules that only apply to
this particular guest.
Now while we conceptionally allow edits, we could argue that a 0-byte
file always surely is a consequence of an error and in that case
regenerate it as if it would not have been there.

Currently creation only happens within
 /* create the profile from TEMPLATE */
 if (ctl->cmd == 'c') {

But we could move that out to a function and call it here as well as
on the ctl->cmd == 'r' path IF the file does a) not exist or b) is of
size zero.