GetPrerequisites: Restore behavior on missing binary of not clearing list
Prior to commit afb674ab, get_prerequisites
would
simply warn on a missing binary and not update the result list at all.
That commit accidentally made the case an error. This was fixed by
!381 (merged), but the fix also cleared the result list.
Clearing the list is incorrect because it is supposed to be able to
accumulate results over multiple calls.
Remove the list clearing behavior to restore the original behavior on a missing binary.
Fixes: #17306 (closed)