fixupdiff: actually apply the DIFadd/DIFdel hack

looks like recent changes made it inactive: must
change $line, not $_.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@562 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
1 file changed