Fix problem on big endian systems introduced in r271579 - when we were
returning from handling a nested nvlist we were resetting big-endian flag.

Reported by:	Kuleshov Aleksey @ yandex.ru
Tested by:	Kuleshov Aleksey @ yandex.ru


git-svn-id: svn+ssh://svn.freebsd.org/base/head@272843 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f