vm_page: Fix handling of empty bad memory addresses filestable/13

If a file with bad memory addresses is configured but that file is
empty (0 lines, 0 bytes), when loading it we end up returning an end
pointer that is just _before_ the start of the (empty) file content.

Adjust the code to make it clear what pre-condition are required to set
the *list / *end pointers correctly, and explicitly set them to NULL
when they are not matched.

Reported by:	marklmi@yahoo.com
Reviewed by:	kib
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D51717

(cherry picked from commit f90940ce6eb71df40538c35a65d77ad3093c679a)

0 files changed, 0 insertions, 0 deletions