K 10
svn:author
V 3
smh
K 8
svn:date
V 27
2015-12-15T21:11:41.178508Z
K 7
svn:log
V 425
Prevent g_access calls to bad multipath members

When a multipath member is orphaned its access members are zeroed before its
removed if marked for wither, so prevent any future calls to g_access on
such members.

This prevents a panic on debug kernels which validates the resultant values
aren't negative.

Reviewed by:	mav
MFC after:	2 weeks
Sponsored by:	Multiplay
Differential Revision:	https://reviews.freebsd.org/D4416

END